New feature at OKCupid helps ID your most alluring profile picture with the help of other users. Comes alongside this iffy move: OKCupid Hides Good-Looking People From Less Attractive Users. Unsavory–though a Consumerist commenter may be onto something re the attractive users thing:
I think it’s just a ploy, I received the same email too and my matches don’t seem to have changed. Probably just a way to draw people back in that haven’t been signing in as often.