I think avenue Q said it best, “The internet is for porn”.
Sure, PornHub is not the only thing you can do on the Internet. Some of the more formal studies are functionally run by marketing groups, who are likely more skewed to advertising demographics.
Example: the fundamental backbone of the internet upgraded as part of the CERN Large Hadron Collider project construction, to distribute the massive amount research data being generated to scientists across the world - but Cloudflare doesn’t count that traffic when preparing it’s statistics)
All I’m saying is: you could do a lot worse than PornHub as a research authority for trends in this subject.
No, I don’t think that’s what’s happening here. I think people are theorizing that X is very likely to respond to pressure from Google and Apple threatening to deplatform them, and loudly complaining about them not applying their own rules equally is a great way to remind their internal lawyers to put pressure on them (insulting the CEOs is just a nice bonus).
Frankly, if the fallot here is a relaxed adult policy, that’s still a win. LGBTQIA advocacy groups tend to get lumped in as ‘adult’, which is a problem for trans-affirming suicide prevention hotlines trying to save lives.
As for your slippery slope question, that Pandora’s box is already open. Just half a year ago Mastercard and VISA put the strongarm on Valve and itch.io to let the payment processors ban any game they choose under the guise of pornography censorship. Pressuring a platform to censure an app ‘for the sake of the children’ just isn’t the virgin ground you seem to think it is.