Someone correct me if I'm wrong but by the pictures on agate website, seems to me that Mastercard will issue their cards. I can see something similar to mastercard logo on their card, maybe that's the clue.
I dont know anything about mastercard but admin on telegram group told me that we can expect cards after mainnet relase,so that means in Q1 2019.They mentioned Intercash as one of the solutions they plan to use for now.
Here is intercash link
https://www.intercash.com/This is 100% confirmed? If it is this is very important, very hard to accomplish this is general so this could be a big milestone.