Unlike most free weekends however, the darkspore entry, atleast for me, isn't the darker grey that uninstalled games are, it also doesn't have free-weekend or beta as a suffix. Also, instead of clicking install, like other free weekends, the darkspore entry just has a purchase button.
I don't like this as a form of marketing, and it's not because I can't bear to have a game I don't own in my games list. I also don't get why EA are trying to brute force darkspore but they aren't willing to be timely with other core games (see: Dragon Age II Signature Edition pre-orders on Steam).