That does work to an extent but there are quite a few of us that don't really post that much and as Matt has said post count limits just encorage spam on the board.
Like everything if someone is that determined to come on here and rip people off they will find a way, it's just a case of getting the balance right to put the scammers off from trying it on but not putting genuine menbers off from using the club and all it's features that it has to offer.
Going slightly OT but maybe folk have got to realise that maybe with the higher priced named brands there is a reason why they cost that much and it's not just a name you are paying for. Both major companys and some of the smaller ones sell products for resaonable prices when you take into account all the design, developement and testing costs a new product should go though before it reaches the market.
The old saying of "If somethings cheap it's always cheap for a reason" comes into play. If there is a product out there much cheaper than what everyone else is selling it for the first question should be why? In most cases this comes down to quality and the fact that it's a copied product saving that company the design and developement costs.