This market: https://manifold.markets/ItsMe/will-a-famous-person-bet-on-this-ma-s6hE6Ih5Lt

The person must cause the market to resolve to YES. If multiple famous people bet, it will resolve to the one who traded first. If multiple answers refer to the same person, it will resolve to the one added first, assuming that person placed the first trade which caused the market to resolve to YES.

Resolves N/A if the linked market resolves to anything other than YES/100%.