The fans pay money and get the Rolling Stones in exchange - it's abstract (obviously you don't actually get the band members to take home with you) but nonetheless sums up the relationship quite neatly in my opinion.
The phrase you're the product! doesn't express anything meaningful about the relationship. Buy any magazine, you'll still get plastered with ads. In that sense you bought a product, and yet you still are a product. You still haven't discovered anything about the quality of the service.
How about comparing a non-multimillionaire artist instead?
-- Mick Jagger (ref: http://news.bbc.co.uk/2/hi/entertainment/8681410.stm)