A few people have done a few tasks and gotten paid real sats.

Aside from that, it's been a bit of a ghost town. I think part of the reason is I'm trying to shove this out into the world just enough that someone else builds an app on top of it for their use case - I don't want to be the guy who builds the fiver, but rather the guy who wrote the framework for how someone else builds the fiver.

So far nobody has been that guy.

The other reason is that something like catallax needs subjective WoT like GrapeRank to be further adopted. A fully anonymous and decentralized bounty marketplace works great when you know who to trust for providing high-quality services. Without that piece in place, people will flock to centralized platforms and centralized arbitrators, like lightningbounties, satshoot and tasker or whatever it's called.

Centralized systems like that are great schelling points. But they're not the way of the future. As with every other decentralized approach, the way of the future has a cold-start/bootstrapping problem.