I have only bought a blockstream gift card because I wanted to buy a Jade hardware wallet, gas cards and now this grocery card today but I am open to trying other ones as well. I just pay in bitcoin and then re-buy whatever I just spent.

What I really like about it is Fold only has 3 or 4 options in Canada and it's stuff like the Gap which I have no interest in but Bitcoin company has gas, grocery, restaurants.