This deal has been available before. BUT….It seems you can do MULTIPLE orders in one day at the $3 buy (It states Limit of 2 per day in the terms). You can add some lots of 2, of any "Try me for $3" product on the ONE order. I did 6 x 1 orders in a row and purchased a total of 12 Cans of Bombay G&T Double Serve Cans for only $36 (Normal price 3 x 4Packs @ $28each = $84, a nice saving of $48) + 2% Shopback.
But the Cream on the cake is that when I added 1 x single can of "Colossal Brewing Mind Harvest East Coast IPA Can 375ml", it registers @ $0 in checkout.. So the Bottom Line is that I could order 2 x Cans of 10% Bombay G&T + 1 Can of Colossal Brewing Mind Harvest East Coast IPA Can 375ml for only $6 which equates to $1.86 per can after $0.30 back on Shopback. This is the best way I can explain it. Cashrewards is a better deal at 5% too atm