I think I've just been lucky... and also budgeted things to maximize those offers for Disney. Like, I got the $25 of $250
Best Buy one on my card and DF's, and we needed $150 in gift cards for Christmas gifts... so we got them at Best Buy, and added a $100 Disney card, and counted it as paying $75 for the $100 Disney. We did something similar to use the other offer.
And we got three of the Staples $20 off $100 offers... our cards plus DF's mom's card (we signed her up for an SPG card, put a few wedding things on there to help her hit the spend, and transferred 2k points to her so DF's parents now have 3 free nights at the Dolphin). We used all three offers to buy Target cards, then used them to buy Target on the 10% extra day, then Disney = Paid $240, got $333 in Disney
And we used the Ebags offers... Because we (really I) have one carry-on sized suitcase that I got freshman year of college because I used to fly home for breaks. So it's just over 8 years old. I'm surprised it's lasted like it has, honestly. It's made countless trips between NE and CO, by both car and plane, 2 trips to CA, 2 to AZ, 2 to FL, and it went to London. Oh, and to Canada with DF. I can see the seams pulling a bit now, though.
ETA: I just realized I miscalculated my AMEX offer savings on Disney card - more like $180, so less impressive lol. I'm updating the original post now because I'm a nerd.