The latest promotion running on Amazon is similar to the one that Target is currently running. With qualifying purchases of $50.00 or more, you will get $10.00 off your order. In contrast, if you spend $50.00 at Target you'll get a $10.00 Gift Card to use at Target.com, so the promotion on Amazon is definitely better.
The selection isn't great on either site as most sets are either out of stock or backordered, due to increased demand and decreased supply here in North America (thanks to the pandemic). You can find some of the better sets available for this promotion below, or click the banner and see all of the sets that qualify.
One idea here is if you buy a Brick Box and one of the Street Sweeper sets, you'll get $10.00 off your order, so essentially it's like getting a free Street Sweeper, since the sets are already discounted! Just some food for thought, as that's what I'll be picking up!