Please note that most of the companies that I introduce here in this section are not operating globally, and they are service may only be available in some countries. What I can say for sure that they work in USA.
Topcashback is one of the best cashback sites and apps available. You can use this app when shopping online in order to get discounts (as cashback rebate). To get cash back you simply go to topcashback.com or open their application and search for the store you are planning to shop from, and click on the cash back link. You first need to open an account. You can use my referral link or just go to www.topcashback.com. Download the app so you can use it from your mobile device.
Ebates is a company like topcashback that pays you for shopping online through their portal. The good thing about Ebates is that if you are a new member, it will pay $5 for your first purchase through Ebates. What you need to do is to open Ebates application or go to Ebates.com search for the store you want to shop from and follow the cashback link. If you are a new user you can sign up at Ebates.com or you can use my referral link. In addition to Cash Back, Ebates has thousands of great online coupons, free shipping, and special offers from its stores, so you always get the best deal.
Shopkick is a popular app that gives its users points (in the form of kicks!) for walking into certain stores, scanning specific items, and for making purchases with a credit card that has been linked to the user account. Once you have enough points or kicks, you can use them to buy gift cards to popular stores such as Starbucks, Target, and Bestbuy. I have so far only collected walk in points, and redeemed them for $15 Bestbuy gift card. Here is my referral link.