What I’m imagining is that someone running a project (like a game studio for example) creates an instance of PieFed or Lemmy or whatever, disables sign-ups, creates community(-ies) for their project(s), and lets people post there.

It would not only allow people to interact without having to create new accounts, but could also help spread awareness of their project.

So I wonder (a) is this possible (b) are the any downsides I’m not aware of.