You can opt-out of those, for now™.
They're also going to work in some kind of revenue split scheme, but naturally not every account will be eligible for it.
Oh, it'll be so amusing to watch the average Tumblrite try to adapt to Pixiv. Sure, any idiot can more or less Google Translate bits and pieces of Japanese here and there, but they won't have their little perfect echo chambers anymore.
A handful of the somewhat competent artists will end up there, and the rest will probably end up in third-rate furry SJW-friendly sites like Weasyl or Furry Network. It doesn't even matter they don't draw one bit of furry art! Perhaps even InkBunny, but it's mostly relegated to pedoshit, and that one does forbid human depictions.
The average "consumer" will probably have nowhere else to go to curate save, I dunno, Blogger is still a thing somehow. Setting up your own Wordpress blog is probably beyond them.