It was a "retail" account, so they were probably happy to look the other way as long as the volume of "business moneys" flowing through it was below a certain t

It was a "retail" account, so they were probably happy to look the other way as long as the volume of "business moneys" flowing through it was below a certain threshold. This would be analogous to a single dev using a [cheap|free] personal license on software for commercial activities, which is de facto OK till you hit a certain size. Then he would be better off purchasing a commercial license.