For example in the screenshot (twitch clip), if you want to share on reddit you click the reddit button, but what button are devs supposed to put to share in the fediverse? Do they pick an instance of their choice?! Is this a weakness of a federated platform or what?
Not sure if you remember an extension called Tumblr Post, you’d log in and then you could share to Tumblr. I’m guessing that’s the only real way short of registering a protocol.