We have issued 23,000 cards until today
So that would be 1 card to every 4 customers? Or how many (unique) customers do you really have? 100,000's?
more likely an average customer has more than one card, instead of a fraction of a card....
We are not only issuing cards, it is only one of the options, we also offer exchange services (brokerage) which is our core business as well as bitcoin wallet and payment processing. Hence, a client which uses us to buy bitcoins does not need a card as he is only interested in buying them.
Unique yes 100,000 (for sure some of them might belong to the same person). It hard to say which clients are active (by definition), as their are clients who are using services every week and there are clients using services once in every six months. But more than a half has used as atleast once.