Peoples intentions can usually be figured out pretty quickly by the staff, and the members. What ever the number of required posts is, some people will try to skirt it. When you set the bar higher, they start resurrecting old threads for no good reason.And 100 post minimum was just a number that popped up in my feeble mind ............. 50 would probably work to ward off folks that only wanted to sell or buy.
To me, it’s just a matter of deal with people you know.