Ibotta has Cinnamon Cheerios (Family Size) for free, limit of 2. Simply search within the app to add to your list.
If you're unfamillar with Ibotta, more information can be found here: https://home.ibotta.com/how/
Referral Code: xoyyamu
Other honarable mentions via Ibotta:
Pringles Wavy (Any Variety) Free
Bai Zambia Bing Cherry (18 oz.) Free
Thanks, I just signed up. Op do you have a referral code you would like to share? Feel free to edit the OP with your referral code. This is my code: pglnslv