I see you said marketplace so im guessing they cant post or make thread in marketplace only. and that they will have to prove themselves in general or other threads right?.. im still trying to figure out how this help except by just allowing only the true long members who been here do the trade and such instead of the new accounts (who could be scammers)
Tho I highly agree with stoping or preventing scammers(cause I got scammed from path of exile after 5exalted orb was snap and Skype remove tactic, which I gave my account away pfft lol). im still trying to see how from one month period stops scammer or help stop it (but it does I think slow them down tho).
beware that scammer has another ability for scamming than posting and creating thread, its call imitation (imitating a person from the forum who is the most popular and this is what I fear the most. cause if I became well known someone will copy my Skype and info and try to ruin my name)
edit notice that im not disagreeing with you im just trying to understand it alittle but plus 1 for suggestion