>>/37106/
Think of the books, their pricing is justified mostly by the costs of publishing, printing, typeseting etc but kept the lowest possible to make people want to buy them at all, author gets small fraction of the price but thanks to numbers of the copies he may still become rich if its a bestseller.
Additional value is added by hardcover, color illustrations etc, so all the things that are a result of the physical distribution mode. This is to offset the possible loses caused by the lack of sales, this is the risk the publisher makes, of course the more books gets printed the better because it lowers the costs of the production ber book but what do with the warehouses of books nobody bought?
Like Hungarian above said, game publishers today dont risk anything like that, their number of copies is infinite and can reach every place on earth with the internet.