Several months ago, I signed up for Endorse. At the time, you had to Endorse specific brands through Facebook and then, when you purchased those brands, you would gather up your receipts and send them in to earn rewards. I got a couple of checks for my effort. It wasn't a lot of money, but it was about $20 each time.
A few months ago, they took a break and reworked some things. Now, it is easier than ever to earn money back on your purchases. Each week, check out the available offers from Endorse. If you have purchased that item - sometimes it is a specific brand, other times it is a type of product - use your phone's camera to take pictures of the receipt and send it in. You will then earn 10 - 100% of the purchase price, depending on the offer.
Some of the offers are not groceries - there has been offers for a cup of coffee or fast food.
The program is supposed to look at your purchase habits and cater offers to your buying habits.
In addition to you earning money back on your purchases, your local schools can get in on the earnings too. "In addition to cash back, we'll also give you points for every single receipt you upload to fund local school projects in partnership with DonorsChoose.org- even if you don't buy one of your offers".
You can sign up through my referral link and start earning money back on the groceries you already buy.