LOL, this is just another reminder that GPL is there so big companies can take advantage of small players. How are the theme and plugin authors are supposed to be able to monetize the development if they can not offer an upgrade path?

Seems like I am going to invest some time into detecting a wordpress.com enviroment and make my plugins fail when it is detected. If @matt wants to abuse my efforts, he will at least need to go with the effort of forking and maintaining it.