I would agree with that, especially for their biggest and most influential subs like /r/news and /r/politics. Reddit's owners have shown they're not above selling out some of these subs to firms like ShareBlue. It would make sense as part of their contract, they'd ensure that the mods were 'suited' to their customers' goals.
Linking to the domain was banned. I doubt reddit has the technical capabilities to effectively prevent them from continuing their alleged bot/vote-manipulation activities.