Has anyone tested their support?
I think there is support on their website, but it works at snail speed so don't expect to get quick answer on your question 
Another thing I noticed is they suddenly removed support for many websites including Paypal for some of their cards, and they have some maintenance issues with disabled withdrawal and recharge.
And If you want to create new card with different BIN number you have to send coins again.
This could be early red flag signs, so be careful guys.
EDIT:
WARNING!
Do not use this cards!
Support does not exist!!
I have been in contact with bit.store‘s support today and got my answer 1,5 hours after sending my message. So support seems to get better.
Btw.: Theyr physical card does not support 3dSecure either. Just like the virtual card.