Problem is discoverability. We all want Peertube to succeed, and they have excellent technology, but discovering content there is next to impossible. Otherwise its active user numbers would grow. It’s the same reason Bluesky - for all its flaws - succeeded where Mastodon failed.

Because he represents a threat to them.

Because their billionaire owners specifically ask them to? Self compliance with regulators?

Masks are off, pretty much everyone but Google has loudly advertised they manipulate the algorithms for their interests, seemingly as a gesture after the election.