Those aren't the Leland snapsticks, and I think the Quasimodo is self-centering. I've never seen an arcade stick that looked like that, and the Leland sticks are the only ones I can think of that were even close to that size. (they're bigger)
I also think that there's a (admittedly small) market for self-centering sticks like the ones on the Quasimodo. As more modern console emulation comes onboard, like PS2 and Xbox, some cab builders are going to want to try thumbsticks on their control panels. Quasimodo won't sell theirs, the dirty dogs. Won't sell their analog buttons, either.