Parking of coins from credit card will be not available. Coins which will be blocked at card will be in the fund(I don't know name of the fund), there will be 4(may be changed) levels of cards

Standard nothing to be blocked, but with high fees and low limits. (2%MNX/4%BTC,ETH)

Gold. 50 coins should be blocked at card, but lower fees and higer limits(1%MNX/2%BTC,ETH)

Platinum: 200 coins should be blocked and lower fees and higer limits (0.5%MNX/2%BTC,ETH)

Infinity: Limited to 1000 cards card. Should be blocked 1000 coins. No fees(in MNX), 20.000$ daily limit and no monthly withdrawal limit. This card is designed for exchanges or super big whales. (0%MNX/1%BTC/ETH)

all cards have 0.5% commission when you topping up them in USD, EUR, BTC, ETH  and 0% fee in MNX

P.S. All digits can be changed. Please wait till official announcement.