Maybe actually sell in pieces, so you buy it one at a time, and if at any point you don't like it you just stop so you could spend 15 dollars on a 60 dollar game. Or if say you don't want multiplayer or single player you could opt out that feature to reduce the price to make you happier with your purchase. Of course if you decided you wanted anything later you could also download that at the same price it would have been at, at the time of the original purchase.