i fear mozilla may be in the line here, finally giving-in to google on manifest 3's limitations, web 'drm', and targeted ads program, in exchange for keeping the lights on (google is their single biggest source of funding via payment for being default search).
I don't think any of these companies resist at all! They keep their head from going red and just choose the path of extra short-term money!
capitalists doing capitalism things 
The invisible hand of the free market yet again proving how consistently good and efficient it is 
o
Imgur and Tumblr too
Short term gains .... and gain them as fast as possible .... because the end is coming near and everything is going to be over soon.
When narcissistic CEOs believe so strongly in The Secret(tm) that they sell the rope and then expect the rope to have non-rope-like properties when leaping off the gallows and instead let them soar into bazinga heaven. 
Every modern law of economics? 
Epic Games
Brands inherently has no value. It's the people that make these decisions. and after the management changes , people expect the same amazing product again but new management wants is profit.
Interest rates 📈
Anything 
slobbers over, not just Twitter.