i had the email for a free one as well, prefer a free pastie, i will not redeem the free coke though...nasty
Mine (newly installed) has 2 rewards, the Coke and a free coffee, just collected both, nice freebie
My app (that I've only ever used for freebies) just got it this morning.
You could carry a refillable cup, and get 20p off your coffee in Greggs. Use the app as well, and you also get the 8th cup free. The combination of 20p off and free drinks works out as about 1 in 4 free compared to paying full price.