I suggest you avoid referring people to betcoin.ag, especially for poker. Betcoin.ag has xiaoxiao, who has a special offer with betcoin, allowing him/her to offer 33% rake back. You just can't compete with that, since it is a much higher rate than what everyone gets paid, normally. It isn't fair competition. Also, there are a bunch of scam accusations against them. Shady site.
Xiao's a good guy and he's gotta sub-affiliate system, works out great for me. With Betcoin, just gotta be patient with them for your issues to be taken care of.