In case you are unaware, Bing Rewards is a free program for US residents only that encourages them to use Microsoft's Bing search service on their PC and smartphones. People who sign up for the program can collect points when they use Bing which can then be exchanged for free e-gift cards from various retailers, along with entries for prizes and other services.
In this case, gaining these 2,000 extra points requires no searching on Bing at all for these members. All they have to do is pre-order the Surface 3 from the Microsoft Store site and they will get those points. The amount is a bit over $20 in terms of exchanging them for e-gift cards. The points will be added five days after the purchase is made. However, keep in mind this promotion is just for this week only and ends on May 4, the day before the Surface 3 officially goes on sale.