Starting to see Gift of College gift cards pop up at my S&Ss (NJ). I'm not an expert on using these, but from what I understand, people use these to make payments on their college loans? I think you can also use them for 529 contributions. A good way to make extra credit card spend/points.

More info here:

Experience with Gift of College 2018- onwards

and here:

https://frequentmiler.com/miles-for-college/