I get why they do this, suicide prevention is no joke and should be handled by people that trained for it, some commenter trying to help could cause a lot of harm without meaning to do so and someone that's not in a good mental space could become triggered and/ or spiral into suicidal thoughts themselves after reading these kinds of subjects.

That said, perhaps the mods could link suicide prevention hotlines from all over the world (as you already do for different resources on -TherapyNeurodegenerative Disease Support, ADHD, Autism, Fibromyalgia, etc.). If I were me, Id put those as front and center as posible, and as easy to find as posible by those who need it (say, quote it after the rule about suicide, include it in the resources given, maybe highlight it).

Suicide.org has some great guidelines on how to mention suicide in the media (not the same thing as a mental health forum, I know, but I personally find them very useful regardless when it comes to discussing anything suicide-related on the internet, where you never know who is reading your content).

And remember, if you or someone you know is feeling suicidal, there's help out there! there's people willing to work with you to get through this, please reach out to them.

Copy paste a bunch of Lorem Ipsum and you're done

Remember all those posts that sometimes will come up in r/relationship advice or subs like that portraying really vulnerable people that are really down on their luck ("Im a single mom/dad and have to do horrible things so that my children can eat" "Im an abused teen and can't escape my home" "Im trying to escape a borderline cult" etc etc)?

Now, Im sure at least some of those were fake to begin with (I don't have anything against those subs or those stories, but you can't guarantee every single one of them is true). Now imagine if they could put a little edit in the end "thank you all, you are so kind, I managed to sign up into reddit's content program, so if you want to help make sure to upvote and leave some gold, it means so much".

In those subs, people were already helping out how they could (I would often see people offering to send food or stuff to OPs home, things like that)... so that's not gonna backfire at all if its implemented.

Im halfway tempted to start claiming demodded subs and filling them up with instructions on how to move to their kbin/lemmy alternatives.
If they kick me out and ban me I won't find out cause I don't go into reddit no more.

Edit: of course they would never give the subreddits to me, but I find the idea really funny

I mean, if all you are posting is John Oliver, it achieves three goals:
1- Puts the spotlight on the protest, which many users probably didn't know much about or didn't understand (cause they were out of the loop and just found reddit blacked out all of a sudden).
2- People eventually will get tired of John Oliver and/ or the same images will start getting reposted over and over again, which makes the sub uninteresting and users less likely to lurk or engage.
3-New users of the platform will come into reddit and see it filled with a bunch of crap instead of thought out content.

Since reddit is not playing fair there is no easy answer on what's the best way to protest. If they remain closed and they just put new mods in charge that will keep the sub running bussiness as usual, making the sub as unatractive as posible sounds like a better option.
I personally jumped ship and came to kbin, but I don't run a subreddit.

Don't really need or want my data during my time in reddit, but it was an easy form to fill, and I spent years making it (although not as many as some of those 10+ year-old accounts), and if it is a pain in the butt for them to send then screw it, its mine and I want it.

I just grabbed my most upvoted comments and "put them behind the paywall".
Of course there is no paywall, but you just get to read the first few words that were there and then I edited in a message saying:

This used to be a full comment, you can find more resources in the link bellow since I have moved to kbin and reddit doesn't deserve my content! Bye reddit, you won't be missed!
For more [subject] advice, find me on https://kbin.social/m/[subject]

Bonus points if I could cut the comment out at the exact time it was about to become useful "Whats actually going on here is that..."

I did that for fresh comments going back to 4 months and most upvoted comments going back until I reached the ones with 20 upvotes. It was manual, I was waiting for something to process in my work computer.

Paul Ekman had this "theory of basic emotions" that were supposedly universal for humans and had their set of "innate" gestures for each one.
For his original works, he travelled to some secluded communities and registered that the expressions for "happiness / fear / anger / disgust / sadness / surprise" were supposedly shared among human kind.
Why do I say supposedly? Because a lot of Ekman's theory was disproved (for example, he claimed each emotion had an area of the brain dedicated to it, or at least some unique structure, which fMRI studies are not finding to be true, even if there is a lot we still don't know on human emotion). There's also claims that he contamined his data when he went to these secluded communities, and influenced (probably unknowingly) his results to make everyone's expressions match the ones he expected for each emotion.

So... are there universal expresions of emotion? Not an easy answer. The physical responses more linked to survival probably are (say fight/ flight in response to fear, startle in response to surprise). The more social ones? don't know, some may be heavily influenced by culture. You would have to make a study on very young, blind babies from different cultures or something of the sort which would not be easy. Also there's the thing that babies cannot tell you what emotion they are experimenting, even if you can asume some (loud noise and baby is crying probably equals fear, BUT the baby can't confirm it, which is a methodological problem for some Scientists).

If this interests you, Ledoux has some great approachable work on the "survival circuits" of the brain that explain emotion in a way comparable to animals and linked to their evolutional value.

Honestly, If I were the mods Id nuke the whole subreddit: delete anything of importance, especially any important asset you made for that community (say, FAQs, resources, links, banners, logos, etc.) or better than delete it, edit it out with information as to where you are migrating, leave the shit behind. When you are done leave the sub closed till they take it away from you, and best of luck to anyone that has to rebuild again from nothing.

Don't think it as boycoting these companies, cause that wouldn't work.
But all it takes is one look at the news (on a very sad example, how target removed pride merch from their stores) to see it only takes a few loud voices complaining for some companies to shit themselves and adress the complaints. Right now, many of them are advertising in a protest / NSFW filled landscape... they may not take a liking to that.

Didn't even know what a 3rd party app was until the protests (never used reddit on my phone to limit the amount of time spent there, and was never very tech savvy).
Left because of other reasons, like a couple mods of communities I love packing up and leaving and the sheer principle of it all.

Probably she wanted to stall the process as much as posible so that they could bill the service some more before cancelling.
That or they have a script to make the service as hard to cancel as posible and she was just parroting that, without really paying attention to what OP was saying.