OH! You just missed a great stacking opportunity on 9/17!
MileagePlus Shopping was offering 20 United miles per $1 at eBags.
The Tumi collection was on sale for 20% off, with free 2-day shipping (ended 9/22).
Chase was offering an extra 5 UR per $1, up to $200 in purchases at eBags, on the CSR, CSP, and CFU using Chase Pay (ended 9/30).
I bought a Tumi Alpha 2 International Carry-On, usually priced $625, for $500 plus tax. I'm still waiting for the 10k United miles from MileagePlus Shopping. I put the purchase towards my SPG Lux MSR and maxed out the Chase Pay promo on our CSRs by buying
Amazon GCs stacked with Swagbucks at
Best Buy instead.