This is one of the things that worries me about steam. They haven't done anything bad yet. Even this ToS isn't any more drastic than anything any other company has done. The thing is... it's like if, say a toy company sold toys. Only the toys had strings tied around them that lead back to the toy manufacturer. The toys are awesome, and the strings never get in the way to much, but one day the toy manufacturer says you have to buy the items you have on layaway, or they're going to use those strings and take all the toys you already bought. You didn't really want the toys on layaway anyway so you let them go. Later, they say that they require you to fill out customer satisfaction forms for each toy you bought, or they will again, use the strings. Do you see how quickly this could start to go downhill. Steam, and by extension Valve own your games. They can do whatever they want with your games, and now, you can't even sue them if you think what they've done is unfair. I'm not saying Valve plans on abusing their capacity to screw us over, the fact that they could so easily is quite frightening. My advice? Don't put your eggs all in one basket, no matter how nice the basket looks.