To reduce the gold reward from $40 (normally $80) to $10 (normally $20) follow this guide btw it isn't expired :)
The deal says it is on all "large and regular value meals"
Although it also works for stunner meals (Small, Reg, Large) well, it has the last three times
Two bomb stunner meals gives you 168 points ($24 worth, for $12) + 350 (for new account) giving me a gold reward favorite stunner meal :3
Once you have a new account simply spend $10, on applicable products and earn, using the app (350 + 140 [10 x 7 x 2] =) 490 BK Crowns (GOLD REWARD)
The gold rewards are as follows ($10 spend -> ~$10+ value):
Whopper regular Value Meal [Recommended]
BK Chicken regular Value Meal
BBQ Bacon Double Cheeseburger regular Value Meal
Ploughman's Steakhouse burger [mmm, Definitely Recommended]
End date, Sunday 20th