I find it kinda rediculous having to wait 3 days or so for my funds to post to the card unless i pay a fee.... Which just eats away at any rewards i would potentially earn.
I dont usually plan my trips to the store that far in advance. And i dont really care to leave much money on a casino company that can go under (despite it being a bitcoin company)
At least with the CONbase card i can get funds instantly from my bank, and only transfer exactly what i need to spend, and do it free and instantly.

