Storage is cheap, and most people won't use near 1GB. They can always kick out the warez punks who are using it to hold ISO's and what-not. They can limit attachment sizes... etc. Comcast theoretically gives 3000 down/256 up speeds, but they also shitcan the accounts of those who use too much bandwidth per month. Google would likely be cooler about it, but really, saying everyone gets 1GB storage doesn't mean they have to buy ($num_users * 1000MB).