Personally, I believe it makes sense, if a campaign is full of people who do not care having negative trust then they will not mind to spam when they believe it is necessary.
True. Most of their participants are spammers indeed which is expected since they don't mind negative trust thanks to advertising this scam site. However, spammers don't get banned in this forum unless they cross a certain limit.
BAN THIS WEBSITE !!!
I have seen this first time in my life bookmakers like this, with promotions and ads on whole internet to scam like this.
Unbeleveble.
Bitcointalk cannot ban 1xbit or any other site for that matter. The best thing that you can do is file a scam accusation along with sufficient proof against them in this forum.