Keeping it as simple as possible.
Member Reward Points(MRP)Is like having cash in the Bank(Tripleclicks).
Once you have them, there is so much you can do with it for example:
1. Buy TCredits and get MRP's for doing so.
2. Get interest on MRP by Bidding in Auctions that offer double (10 MRP each)
instead of 5 MRP each time you place a bid.
3. Exchange MRP for stuff you want to buy at Tripleclicks Store.