That was my question: What constitutes a "broadcast". Playing the music in a store is considered a broadcast? I went to the SOCAN site and found this very interesting bit from their FAQ's:

"Q: I've heard my song on the radio. Is my royalty cheque in the mail? A: It would be impossible to log every radio station in Canada 24 hours a day, 365 days a year. The cost of administration alone would leave little money for distribution to members. As a result, all societies in North American employ some form of a "sampling" system for radio performances. If your music was played on a station not being sampled at that particular time, and if it does not turn up on other sampled logs, no radio royalty will be paid. We cannot accept data that is from outside our system."

So they enforce the royalties only if they have monitored the station. Sounds like a big loophole to me. Ah well, I am ignorant of such things, but it seems funny to me. Margo