For me at least, part of it is a degree of "brand loyalty" because I used Sync for Reddit for a very long time. I paid I think 6$ for the pro version years ago and got absurd value for my money.

Now, the dev makes the move to Lemmy and enables an experience that is both very polished and very familiar. I don't mind paying a (one time) fee to support the dev in that setting.

Re: trackers, my current understanding is that all of that was attached to the ad system, and removing ads functionally removes the tracking. My pihole provides a good measure of cover too.

If someone wants to stick with another one, great, I hope it works well for them. I suspect I'll be happy here.