Earlier quoted context omitted.
I'm personally not at all attached to the 'mastodon.social' domain (i'm self-hosting my own account on a different instance), but I am somewhat surprised at this perspective on TLDs. Most users of the internet have been exposed to TLDs other than ".com". For example, wikipedia is at a .org TLD, US government sites are at .gov domains, university websites are at .edu domains. Most non-US users will frequently interact…
I would like to add a few things on top of the relatively technical reasons why this lack of .com doesn't matter. I'd say most users won't type "mastodon.com" in their "browsers". They will type "mastodon" in their "internet" or, if technically savvy, into Google first. Second, from following the fediverse (not just mastodon, but also pixelfed, peertube etc), i have a feeling that they aren't into mainstream, general…
Ultimately this is kind of a problem, as we desperately need an general audience alternative to FB/Twitter that isn't about turning outrage into dollars. Right now I'm sure it's nice to hide from the Eternal September, but in the meantime Facebook is enabling ignorance, wasting everyone's lives on purpose, and proposing laws that only they can afford to comply with.
OP is about Keybase, which is trying to solve the problem of why the whole world isn't using GPG. I'm just pointing out that Mastodon has some public adoption issues still, despite the benefit that it can bring to the world.