What's in it for them? ActivityPub is a lot like e-mail and that is now basically controlled by the large centralized players like Gmail, Yahoo, Microsoft. It

What's in it for them? ActivityPub is a lot like e-mail and that is now basically controlled by the large centralized players like Gmail, Yahoo, Microsoft. It was just a matter of time before one of those large actors got into ActivityPub. People who want to communicate with their instances will have to conform. Yes many in the fediverse are very distrusting of the large corporations and will instantly block Meta. But many others just love the technology, the ability to communicate across platforms, and will try hard to be part of it.