A limited 150,000 unit run of five different stamps – black, red, blue, yellow, black – allows the owner to use a physical stamp, but then save its image in their wallet. According to a Reddit user, the distribution is as follows: 1,500 red stamps; yellow, 10,000; blue, 20,000; green, 40,000; black, 78,500. The stamps retail for 6.90 Euro, meaning the entire project will bring in just over $1 million.
I could grab mine yesterday and I wanted to buy another unit after 40 minutes but it was sold out.
This is the link in case more will be available. I intend to buy more.