Covered elsewhere but you no longer get 5x points on Ink Plus/Cash on eBay using Paypal Digital Gifts. Also does  not work with giftcardmall.com anymore, although giftcardmart.com still works. But most reliable way is to:
- Right now on chase, there is a 4x bonus for using chase mall to get to staples.com but only for physical goods not for gift cards.
- Buy Gift card through the office supply portals. So for instance, they have Airbnb gift cards.
- Then click through the deltaairbnb.com site to get 1 Delta point per dollar (was three points last month but that promotion seems to be over).
- Then book with Airbnb using the gift card.
There are also occasional promotions via Amerideals for 5% off on Airbnb as well. The net discount is:
- 5x 2.2 = 11% from Ink Cash/Plus converted into Chase Rewards assuming you have a Chase Sapphire card.
- 1.4% for the Delta point
Net, net, you get about a 20% discount if you buy anything real with Staples and 11% if you buy a gift card.
