And the reason is...
Posted by captainobvious on .
If Vimm put all the games (or a bunch of the games) into one big packet, you probably wouldn't play all of them anyway. You would only pick out the games you know and maybe look at one or two of the strange looking ones, but the rest would be wasted bandwidth. That's also why there's the download limit, to keep people from spam-downloading everything at once and clogging the internet from the rest of us who just want one thing.
Hasn't this answer been given before? Maybe it should be in the FAQs.