I don’t understand how ActivityPub works that well and I haven’t used Threads so maybe I just doing get it.
But why would we have to worry about defederating Threads when it’s a Twitter clone? It doesn’t have communities and such so I would think it’s not compatible. We’re not federated with Mastodon instances right? This seems like something for Mastodon to worry about. How is a Lemmy instance refusing to federate with Threads relevant?
Are they using an off the shelf ActivityPub implementation (if so, which?) or just implementing the protocol themselves? If it’s the latter, which I expect it is, then implementing the protocol does not save development time or effort. It’s just a set of specifications that they decide to conform to, rather than doing things some other way that may better suit their business goals.