Your argument seems a bit twisted yet somewhat understandable. If it was the beginning of the strike sure but as the OP said, they waited until the boss fight to spam him with invites and ask him to leave and then tell him to leave and then refuse to help him finish the strike, all so they could farm the strike with a friend of theirs that they could have easily waited for. Again, your argument makes sense if they asked at the beginning, but seeing as though, in this situation, they waited until the boss fight, I'm going to side with the OP on this one.