Can confirm I received a total of one direct message from a newly created account on the Pleistocene proboscidean flagship instance; some crypto-crap scam spam.
Glad I use a fedi platform that actually has anti-spam features. Time to use (more of) 'em, I guess.
We're aware of the spam attack hitting mastodon.social right now and our full moderation and DevOps teams are on the case mitigating any way we can (incl. switching to approval-mode registrations)