i have studied copyright on my music degree, so i have learened about it, i cant exactly tell you all the ins and outs...if you really want to know then you should look in to it, cos its complicated...
basically it is all worked out in percentages, so they cant exactly say what goes to who...but its probably about right, radio stations have to plan in advance the songs they will play, and pay so much for some amount of tracks...they are limited to a certain ammount of songs...thats why they talk so much
with playing cds in salons....when buying the cd...u pay for your listen, but the licence covers the cost of the clients listen...thats why they work it out by how many peep u get in.
it costs...thats the bottom line, and if you guys dont like it, like i said earlier on here...make your own music for your salon (its so easy!), or dont play music at all!