This is an interesting topic and it raises some questions:
Are they too niche oriented to produce significant revenues unless you built a portal targeted at game players?Could they be added to exisiting casino portals with any degree of success?
Would there be a potential problem with the games appealing to minors? How do providers screen out minors presently? Do the games appeal to adults and would adults spend money playing them at any sort of level that would be considered profitable?
Are skilled games coded as gambling transactions? Are they subject to the same banking difficulties we see at online gambling?
Does anyone know if skilled games are available as free content by an affiliate program?