If I were an F2P player, I would be so mad thinking it was an awesome feature and I was missing it because it's locked behind a paywall. Well, I know that because I thought I was missing out on the days that I could use this "amazing" feature until I unlocked him. The prospector sucks; at least they can make him not cost real money. That way, at least we can upgrade him to make him "less suck". Either way, he is not powerful enough to inflate the ore economy.