...should. That notion could disappear really fast if Twitter gets to decide who can run an instance based on their belief systems.
In the mean time, it's an interesting case study of what happened to Wil Wheaton when he tried to join a Mastodon instance. Already, even in these comments, people are expressing concerns about how Twitter will be able to maintain control over "misinformation and abuse".
That's the whole point of decentralization guys. It's impossible to moderate Twitter without being authoritarian and creepy. Bail on the concept of controlling others, and delegate that power to the end user by means of improved blocking tools.
If decentralization is going to work, we have to abandon our desire to control others with a centralized authority, and accept that responsibility as our own.