I got Fiber One Supreme Brownie Pack of 5 from Star Market (Shaws). Found Mail in Rebate form on the Stand for Full Price. YMMV because i cannot find the Rebate form on the Internet.
Also attaching the pictures of the Form and Terms Below.
Offer Void in RI, CT, ND and Miami Dade County. Purchase Products between 12/18/17 and 05/28/18. Mail-in form must be postmarked by 05/21/18 and received by 05/28/18. However North Carolina residents must mail and postmark their form by 04/28/18 to be received by 05/28/18. No Post Office Boxes allowed,
yada yada(Rest of the terms in Pictures)