I have done business with Raise.com about 3 or 4 times as a purchaser and once as a seller. I have received many fraudulent GC's from them. I will admit that they fix the situation as soon as I call them about it. They do offer a 100 day guarantee on their GC's. I would consider this an industry standard.
The one time I sold to them, they deposited my money into my bank account very promtly.