I have a Chase Ink Cash. I just discovered that I can buy Home Depot, Lowes gift cards through the Chase Rewards Plus mall and get 3points per $. I am in the construction business so I can really add up the points. I burn through the 3% cash back monthly 1500 limit in the first week of each month. There are also other partners that let you buy Gift Cards.

Earn 3 points per dollar 1

The world's largest home improvement specialty retailer and the second largest retailer in the United States.
By shopping online through Chase Rewards Plus you are acknowledging you have read and agree to the program terms and conditions.
NOTE: Not eligible on Installation Services and on purchases made with third-party partners where the customer is leaving the homedepot.com web site.
******Eligible on the purchase of gift cards. Not eligible on purchases made to buy a gift card using a gift card.*********