Spend $15 or more, get $5 back on your Amex (check for offer)
Link above card to the Drop App
https://www.earnwithdrop.com/Drop has a boosted $12 cash back in points for Harrys purchase (points can be redeemed for amazon gift cards starting at $5 min)
Buy via the drop app link on your phone
Collect $17 back from both.
Even if you dont stack the amex offer you still get the $12 from drop.
Last day.
Enjoy your free stuff from Harrys.
Edit: To clarify, Language on drop doesnt specify a minimum. I took screenshots just in case. Never had issues with drop even when cash back didnt kick in tech support resolved quickly. Also, to make that $12 a round $15 in order to fully redeem your points you can sign up for apple music trial via drop for an extra of $3.
