They are currently on the block-list here.
I don't really see any substantial difference between them and lemmygrad.ml and in fact a lot of the active users seem to have accounts on both sites.
I guess they are somewhat less tankie leaning, but make up for it with shere toxicity and low effort shit-posting. I don't really want to have to moderate that here all the time given that their admins are highly unlikely to do it on their end.
Maybe their current toxic community will dilute out a bit over time and removing them from the block list could be considered in the future. But right now I don't think this would be a good idea especially given the huge size difference of our community.