As far as YT & Google et al, I don't participate. A good while back, I tried to promote some of my music on YT. The experience was...... terrible afaic. I used to use YT for tutorials, but there is no way I'm going to jump through all their hoops and endure back to back, un-skippible ads, to find out that the tut is shit. Screw that noise.

Reddit has been silently rejecting accounts that sign up with a VPN for quite some time now. If you make an account using a VPN, an alias email, using a hardened Firefox, and all the blockers, you can expect that your account will be shadow banned almost immediately. So, as long as Reddit front ends work, I'll still use it as a resource....for now.

I foresee that private forums will become a thing again where people of like minds congregate and exchange info, expertise, ideas, content, etc. They were once quite popular but people gravitated to these multi billion dollar corp owned social media outlets because it was the next best thing, and now the other shoe has dropped.