Let me just say. I’ll still use WordPress although I think it’s maintainers were a little “off” on how to derive their revenue. Actually, the only thing I disagree with, is that they hid the links. If you’re going to do something like this, just make the links visible. I have no problem with WordPress making money from Adsense, even if it’s an open source project. I don’t think it’s “spammy”, it’s just a way to game the system. If they’d gone with making the links visible, Google wouldn’t be at the point of removing the links from their database.
Unfortunately, this was probably a good source of revenue for the WordPress guys and a setback in financing this free project once Google removes the information.