Don't discount the power of posting on LinkedIn for all recruiters who have remote positions to please contact you. I know some recruiters are forbidden by their clients to name the company that's hiring remote workers either because the company's PR dept is insanely jealous of controlling how their name appears in all forms of media or because they don't want their on-prem FTEs to realize they could probably be working from home... or both.
Remotehub would be more useful if you could filter/search by role/position and programming language/technology/skill i.e. software engineer, or developer, and java or python or ruby etc