It was also difficult for any forum members to notice because he was not a reputable member and posted more frequently in his local board, and it appears that he was only making the switch once a week, Bettercaulraul is his main sig and avatar and was only switching to Duebits a few minutes later before post counts and switching it back immediately because Duebits participants are simply too numerous in numbers.
Your opinion raise an interesting question here, since Shan85 is active in his local board, how can the other users who are active in his local board doesn't realized if Shan85 is participating BetterCallRaul campaign? I think when we're active posting in a same thread, we will be more familiar with other users.
Although all active users in Pakistan board shouldn't be blamed, but I think it's quite suspicious.