@atomicpoet That's some Highlander-esque zero-sum thinking from Random Guy! Too much Platform Thinking, and not enough looking-ahead Protocol Thinking.
What gets me excited about all of this are not the Mastodons, *keys, Pixelfeds, etc., but instead the idea of augmenting existing sites with ActivityPub - such as my own @freshcomics - so that when I put new releases up, that release data shows up on the feeds of folks subscribed to the hash tag for a series or a favorite creator.