Honestly, this really bums me out...
They've always been the go-to when there was a game I was looking for. If you have any recommendations, I will gladly take them.
I mainly used them to find unmodified games, especially useful for ROM hacks where I wasn't bright enough at the time to make backups.
I only needed it every so often when I was looking for a niche game (Gregory Horrow Show, anybody? lol), so to know now that if I come across a game or ROM hack I'd like to try, my search will be just a bit harder.