Previously they already knew and understood the consequences of joining the 1xbit signature campaign, but still dared to join there, that is what is called ignoring fraud charges.
Back to the first chapter: The average user promoting 1xbit is a user who has previously been negatively tagged. That's a fact. Then because they are accepted as participants even without good quality posts, this triggers their desire to earn money. There are only a handful of neutral users willing to promote 1xbit because there are other campaigns that are also potentially safe.All of them know the consequences, in fact I'm sure they were ready in case they account were banned from the forum because promoting 1xbit.
Snip.
Well, the simple answer is that if you have money, you can sell the scam. 
They have the money to pay the signature participants and they have the money to advertise outside the forum too. With so much extensive advertisement, people can easily be convinced to deposit and play at 1xbit.