I'm amazed at how angry people are at ads. I agree that this change would be terrible purely because of the customization thing, but people at some point are going to have to realise that there is no such thing as free lunch. You're using their service/web site, they say you have to pay by watching ads and thats the deal you have. If you don't like it, don't use it, because if ads weren't a thing, the whole internet would be paywalled (apart from the sites people host from their own cash/donations). The internet and big tech has for so long taken the stance to grow fast make money later, but many never do. I feel like the time of reckoning is soon upon a large part of the internet, where if they don't make money, they'll vanish.

Edit: just so I clear it up before anybody starts yelling at me about it, I am very much against this change for multiple reasons, but it's just that it triggered me to see so many people attacking the wrong thing. We've just become spoiled by unsustainable startup practices and have lost touch with reality.