I'm up to about $28 on Ibotta after not too long. What helped a lot was a couple of the specific store offers. For instance, I got $5 for spending $15 at Hallmark. And then another $5 at Aero for spending $50, which is easy with a teenager who's growing like a weed! It didn't matter that I used a coupon at the store as well--so got 20% off everything in the store, bought things that were already on sale, and then scanned receipt for $5. Both of those also added to the team goal, so I got a $5 bonus there.
At the market, I honestly don't buy anything based on what's on Ibotta. But I do go and check it out when I get home to see what things I can enter. Just yesterday, I bought tomatoes, onions, lettuce, Kashi waffles, Ragu sauce, and cereal, all of which earned cash. It was a total of about $3.00, but still better than nothing!