If it were so simple to revoke these keys as OP is implying, why would the game publishers be telling people to literally steal their games instead of buying on one of these key resellers?

What G2A is selling is usually Steam keys. They’re not always stolen through credit card fraud but also through pretending to be game media for review copies.

If it were that easy then G2A wouldn’t exist. Use some common sense.

The fediverse is deliberately designed not to do that as federation is not cheap in terms of computing resources. I believe it’s exponentially complex as the number of federated instances grows, at least that’s my understanding with Mastodon.

Yes, federation isn’t a passive thing that the instance does. Think of it as us living on an island and striking forth as explorers to make new trade routes with other lands. We can only know about those other lands if one of our explorers has sought them out.

If you’re looking to “glue” a bunch of APIs together, a service like IFTTT may be something you want to look into.

I haven’t been involved in the project for a decade or so but I was one of the founders of OpenRA, so thanks for recommending it! I’m very happy it’s still actively developed nearly two decades later.