minexbank takes the interest to pay the parked money of the miners, but if the miners stop the machines because the price of the minexcoin is so low that the electricity it consumes can not be paid, the whole ecosystem would have problems for pay the parked money
does not matter how many miners will mine MNX 3 or 1000. Minexbank will get same tax.
But it pays the taxes with the money generated from the miners. each block mined part of the coin goes to minexbank