'Made For Adsense', sites that add no value other than to get google traffic in order to sell the clicks back to google.

Google is heavily cracking down on these nowadays, so it's less of a problem than it used to be, but the sheer number of RSS feed regurgitators made searching for something very hard for a while (end of 2008).

MFA is a predatory strategy, it just takes without giving back.

Remember all those wikipedia clones with 6 adense ads per page? That's MFA, but there are lots of other examples.