Many people find the constant stream of 'updates' in the Facebook Ticker more than annoying. Still, it's the wave of the future, automatic sharing is what's hip and anyone who doesn't agree is living in the past.
Not satisfied with flooding users with 'listened,' 'read' and other equally crucial info in the Ticker, Facebook is preparing to add ads to it as well.
Granted, they're not outright ads in the classic sense, though people are paying for them. They're activities from your friends that just happen to be related to an app or page that wants a bit of promotion and is paying Facebook for it.
The new 'feature' has already started rolling out, so it should be hitting your ticker very soon. Presumably, Facebook has to start making more money from somewhere to justify its tens of billions of dollars valuation.