Consultants, Evaluators, and Agents

Not long ago someone wrote to me out of the blue and offered to pay me to act as a consultant to evaluate his tabletop game.  He’d read my book “Game Design: How to Create Video and Tabletop Games, Start to Finish.”  He had been working on his game - I assume a tabletop game in the circumstances - for 20 years, and evidently felt that my advice would be worthwhile.  However, he was coming from