With them, you browse offers in the app, purchase the item featured in the offer, and when you upload a photo of your receipt, you get paid. Another app to consider isReceiptPal. This one pays you for any itemized receipt, rather than for purchasing specific items like Ibotta and Checko...
Heck, I would even go to each and every hardware store until one would write a receipt that specifically said "left handed <item>" on it. Let the wastage of company time and money be on their head. (And to note, that is not because I want to waste time, but if I'm going to ...