If you look at the main dev's profile pictures, they are pictures of Fidel Castro as a young man. They are one of the only new big instances that hasn't blocked lemmygrad.ml, which is basically a tankie pro-CCP pro-Russian-invasion instance, and it is rumored that they mod them with their alts, and that lemmy.ml and lemmygrad.ml are hosted on the same IP address. Lemmy.ml being the biggest or one of the biggest instances, and also the main developers being the leaders of that side, it makes sense to worry a bit.
But as others have said, just don't give them money, sign up elsewhere and you're good.