As I presented in class last December, it has been possible to order dollar coins from the US Mint with free shipping in order to earn frequent flyer miles / hotel points.
I lost track, but have done easily over $80,000. I’m not trying to brag, as I was an amateur compared to some people, such as “Mr Pickles” who did $800,000.
I did try and spread the dollar coins throughout the city. Just ask my babysitter, people at fast food restaurants, and Costco.
It was fun while it lasted.