>not take 4% back on gas and 3% on restaurants yes? This is the same argument for using stuff like gmail. What, are you really gonna pay 20 bucks a year for email? I'm sure everyone's price to sell away their privacy is different but I'm a little off-put by how cheaply people are selling themselves these days. I hope it never becomes a problem (e.g. Stasi) but if it does I won't be crying for those people whose lives will be ruined.