Exactly. I've got an Rdio subscription but I'm waiting for the other shoe to drop. As a small label owner where we put in more investment than we've ever gotten out, it's crazy to see a thousand streams generating a couple of pounds given that those are all lost sales... but you think 'ah well, at least people are listening to it'.
Also, as a commenter below noted, pay-what-you-want is not new at all. Off the top of my head The Crimea shifted about 100,000 free downloads of their second LP after leaving Warners, quite a bit before In Rainbows.[0] As a second aside, I interviewed a pretty big artist a year or so after whose backing band knew Radiohead and, though this is hearsay obviously, they suggested the reason In Rainbows wasn't toured much beyond festivals was lack of tour support capital. I always sort of suspected that they fudged the numbers on sales/profit for that record, so that could be an indicator, who knows.
[0] http://www.thecrimea.net/products/502351-secrets-of-the-witc...