First, here is an overall shot.

The big deal here with the coupon is 50% off the Build A Mini 3 Pack with a $50+ purchase. It's $10 regularly so its $5 off.

The August monthly build will be a duck (how quaint). Too bad we're probably too old for this and I don't have any children to exploit (perhaps I could borrow my niece).

HERO Factory available August 1st in stores.

Also note that there is a sale on two $10 sets between the 23 and 26 of August. It is the gas station and the home building set. They will be $5 each during this time.
At the top of the page it also mentions VIP members getting an extra 50 VIP points when they purchase the LEGO Airport set from online or in store. That's half of the 100 pt requirement for a free $5 so if you're planning on purchasing that set, might as well wait for the first week of August.
I don't know if this has been posted anywhere else yet. I hope not.
Good luck.