6PM.com has a huge sale for the next couple of days with discounts up to 90%. While the sale will go on till the 28th, you should probably take a look right away to get more choices and more available sizes. Lots of big discounts on shoes, and much more. Free Standard Shipping is automatically applied at checkout on orders totaling $50 or more before tax.
I don’t think you can earn any cashback from shopping portals for these purchases.