Tough, but that be the rules
Either be quick about it or pay, if you want to legally get that classic game, or... use the non-legal way.
That's more choices then in the new FallOut 3, believe me.
Also, I *think* the game could be easly copied with all the folder's contents to another computer and you could still play it.
You know, the site is merely something like a free advert, and a way a to get a few bucks out of those oldies for the developer (or whoever runs it), not the one and ONLY way to get them.