As of a few months ago, lemmygrad is run by them as well. I don’t remember the specifics, but there was talk of some form of taking over every other Lemmy instance as well (I know there were calls for it from at least one of the tankie communities, either lemmygrad or hexbear), and the general hostility of both lemmygrad and hexbear users was why many instances defederated from them at that time.