I bought $100 Amazon and $150 TRU yesterday and got 700 points. Looks like the amazon gift card earned 4X points. Today I went to another Kroger and bought $200 Amazon gift card and confirmed it. See the receipt for details.
Not sure about other gift cards except TRU (2X points).
If you purchase something through a post on our site, Slickdeals may get a small share of the sale.