Cooper is currently running a rebate of up to $70 with purchase of 4 tires on select product lines. Includes STT, I think AT3 is included, several others. Good until 15 April 2015.
Goodyear/Dunlop has a current rebate going through 30 June 2015, with purchase of 4 tires. Includes $60 for Wrangler MT/R w/Kevlar; $40 for Wrangler Duratrac; several other products. Rebate form on tirerack.com (I don't think you need to buy from Tirerack for the rebate).
There are some other current tire rebates listed on tirerack.com, some of these look to be exclusive to tirerack, and look to be more for car tires (Pirelli, Dunlop, Michelin).