LuckyPokeGirl, exactly.
Truth be told, this isn't the first time they've done something like this. The first time it was several months ago (you probably weren't around then), and it was supposed to be a Game Corner reboot. They just scrapped everything and started the GC anew. That system did work for a while, and very well, but for whatever reason they reverted to the old system.
...It's highly ironic that they helped to create the problem that made it get wiped in the first place.
Moving on, the reason is that because of the system in place, most of the games in the GC don't require that much intelligent thought. Pretty much all games are allowed to go through, no matter how silly they might be. And unfortunately, most of the games (but not all) fit into the silly category, and they don't end up going much of anywhere.
RPGs, Count to 50, and the Ban Game are the biggest culprits of all.