Apparently the domain is shadowbanned (https://news.ycombinator.com/from?site=minimax.io) which is why people kept submitting it (and normally they cannot be vouched), and presumably a moderator gave this one their blessing.
The solution is for @dang to unshadowban it because Minimax is now a newsworthy company.
it could be the state of HN and not result of shadowban, that some newsworthy link has to be submitted 8 times to go through.
They were a newsworthy company when their domain got shadowbanned, too... The spam detector is blind to such things.