I'm personally not one to tag accounts simply for wearing a signature, but I'm not entirely against it either... depends on the context. In this context it seems that the tag has already served a benefit, and probably no longer does.
I somewhat agree with your position. This is not so much about the participants in the campaign as it is about the organizer. It looks like 1xBit is getting what they deserve.
I don't know if they're scam or not because I haven't personally dealt with them (and I don't intend to), but their way of conducting business is disgraceful. As long as they continue to ignore legitimate accusations against them and, at the same time, wish to promote their business on this platform, they deserve condemnation from the community. Therefore, I support tagging all members who ignore all warnings and are willing to promote anything to get a few extra dollars.