It could be handy if it had been real disks they had come on. Some people can't for some reasons write their own images back to disks. Here it would be a nice service if they threw in disks for the game as well, at least I'd think so. But E-mailing isn't a very good way to do it.
Oh and I believe there are harder punishments for pirates who charge for the copies than pirates who do it for free. Something about profiting from other people's work where others don't seek to make a profit.
I haven't really browsed the page but if they had agreements with the copyright holders of the game I'd say it would be a good thing to actually pay a small amount for an old game. I know I'd want to pay knowing the copyright holder hopefully gets a share of it too if I couldn't find the original.