Interesting idea. Do you have a mechanism where a moonlighter(?) doesn't get matched in a specific geography, industry or set of companies? Presumably your workers are being employed somewhere and not all employers are friendly towards moonlighting.
Also, I'm curious if you have researched the legal framework around moonlighting coupled with non-competes. My limited understanding was it is very state-based. NY, CT are not permissive while CA is very permissive. If you figured this out, there might be a lot of value to unlock.