I, personally, think they may be skirting the 'fraud' line, as they do NOT pay to their own written pay schedule. It took 6 months and multiple follow ups from me to get the one shop paid for that I very mistakenly took the risk of accepting from them.
I agree, if they post their payment schedule, follow it, and pay per it, then it is definitely not fraud.
On the other hand, I am convinced that if I had not made a written/verbal and finally a written "I'm going to report you to the BBB" letter to them, I would never have been paid at all.
BTW-the gal I spoke to in person, and that finally paid me told me that you 'no longer had to send the invoice in'. I told her that it stated that you did in the instructions, and she told me that they were 'outdated instructions'.
Uh huh....