Just a thought, How about increasing the trader feedback from 10 to 20-25 or more to get the expert trader medal. 10 trades is simple. Whoever currently has the medal can keep it (like me ) but for future people they need more trade feedback. This will make getting the expert trader medal harder and people will Regard people with the medal as more trustworthy.
Yea in theory it works Mr. Awesome.. However, we don't have enough activity / trades for that to work. To be honest, I haven't seen any newbies stick around and rank up / be active / contribute in a long long time. Seems just old timers sticking around, with the odd newbie here and there that slowly disappear.