It's boring to frame Mastodon as a Twitter usurper and much more interesting to think of it as an experiment for techno-socialism.
While users don't "buy" Twitter, Twitter sells user data to companies looking to make a profit off of users. People who have the means to create or support Mastodon instances provide the "service" for free. $ and tech skills get re-distributed to a wider community. Nothing and nobody is bought and sold.
@amy Good points but is there any guarantee that later on that people *couldn't* use Mastodon in this manner that you're aware of?
@virt there is NO guarantee that people won't do that. buuuut I don't think there are any tools in the Mastodon codebase that would let admins mine user data. Data mining infrastructure *could* be built, but that requires significant investment and I think almost all instance admins are hobbyists.