Yahoo buys Flickr - which is one of the reasons why I no longer entrust my data to central services but do everything myself (and am currently working on a site based on WordPress with a few self-knitted plugins - stay tuned). I experienced this with OneList, I went through it with eGroups. Yahoo buys it and then there are tons of transition pains when merging the accounts. And afterwards there are tons of ads on the pages, forced ads on interstitial pages and all sorts of nonsense.
Unfortunately, social software is often operated by antisocial guys ...