A monthly subscription to having the artist or company make content. Not to the actual content itself. The subtlety here, is that if people are paying the artist to work, the work itself can be free or sold-at-cost if physical. So basically, you get what the web used to be before the bust - free content as far as the eye can see.
It's interesting and I'm glad it works for independent artists, but the cyncic in me knows that if it were to work on a large scale, some ad-tech company would figure out how to game it.