[blueadept111]

I think "Trade your experience" would be more valuable than "trade your expertise". If I need expert knowledge of a well-defined domain, there's always Google. But if I need advice from someone who's had a particular experience, there's no easy way to find answers.

For example, I'd like to talk to someone who's self-published a book and overcome the many small challenges associated with that journey. Would this person identify themselves as an "expert" in overcoming any of those particular obstacles? Probably not.

And similarly, I have a lot of experiential knowledge to share with others, that doesn't necessarily fit under the umbrella of a single "expert" label. My valuable experiential knowledge covers dozens of niche areas.

I'm not sure how a service could effectively act as a match maker for that type of experiential knowledge, though.