You don't really understand how retail works either. I program replenishment systems for a fortune 100 company. If something is in the bargain bin, it is because it is being discontinued and we are trying to get rid of the inventory. Simple as that. If a buyer or merchandiser placed a big initial (new release) order on a product with no hopes of selling the inventory, then that was their mistake. They were not in tune with the market. If they repeat this mistake too many times, they will be out of a job. The replenishment system is intelligent enough to "replenish" stock based on past demand from that point forward because it knows what past sales were by store/region.
Edit: The main point is, the stuff in the bargain bin usually isn't sold at a huge loss to the retailer because that is stock they already bought at a hugely reduced price from a $60 initial release retail game. So the $10 game in the bargain bin probably only cost $10. Or there is an agreement with the vendor that you can return any unsold product and get refunded and the vendor just said, eh, throw it in the bargain bin and we will refund you the difference of what you sold it for and what we sold it to you for.
