Most dollar stores, toy stores, and closeout warehouses have boxes and boxes full of pogs. When I worked at Service Merchandise we had half an aisle in the warehouse, just filled up with unsold pogs. We could not sell those things at 90 percent off.
It wasn't until we went out of business that we finally got rid of them. The man who bought us out yelled for nearly an hour when he opened the 50+ large boxes marked "toys", and found they were full of pogs. (He had already signed the contract to buy all the remaining merchandise at 90 percent off the retail price). That man ended up paying for over $4000 worth of pogs. (He didn't even take them, he just had his men throw them away).
On an even sadder note, apparently some people actually invested in these things, thinking that they would become valuable collectables (like baseball cards or something).