Just got $31 or so back on a Marriott stay - I actually bought Marriott points to top off points I already had to get 5th night free. I wasn't expecting it to trigger the 5% Marriott back so that was a good deal. Also should get 5% back on a second Dell purchase I made this week.
Overall, surprised how useful the discounts are. I expect to use 4-5 more in the next month, from Dunkin donuts to on to fragrances. If I was still a Marriott loyalist it's be great as so many brands running 5-10% back.
Anyway, I've saved over $100 USD this week. The coupon got me to buy from Dell which I wasn't planning on so good for them and good for me.