I think this is new idea in bitcoin forum, so i think most us have some question such as :
1. Can we trust the company?
2. Is it really anonymous? We don't know if the company keep our transaction details.
3. How about the fees?
4. What happen if we still balance left after 30 minutes and the card is no longer vaild?
Even the demo is quite bad (it's vertical video) and the FAQ page doesn't help much.
1. i couldn't find much about this company, i hope it becomes a good and trusted one in the future.
2. they will surely keep logs even if they say they don't
3.
https://shakepay.co/#/faq click on "What are the fees?"
4. i think you change your account and it may stay inside your account with shakepay.co but not sure.
Has also the issue of restricted countries, will these cards be covered in more countries?
although they have many countries in their list but it is the worst restriction.