king: I keep my main email fairly "clean", i.e. I don't sign up for anything on it. Even the email I use for most stuff, like here, devart, etc., doesn't get any spam, maybe 3 a week. In that one instance, though, I signed up for the one site and 20-30 marketing emails came in the few days that I checked..
Spyware is a problem with these sites, too. I remove literally dozens of them from friends' computers regularly. So when I tell those people, "be careful what you download, especially free demos and such", it isn't good for the poor game developers, and it really isn't always their fault.
I don't mean to get the thread sidetracked. I just think that the download size is secondary to most people, especially if getting the file itself involves a lot of hassle with a third party. I'd be curious how many people are capped by their ISPs too. I have no problem with straight-from-the-developer downloads of any size.