i emailed coinpayments today requesting them to add DMD and they replied very quickly, great customer service!!

Hello Jim,

It will if there is enough public support, the best way to get it listed
right now is to participate in the public vote going on now at
https://bitcointalk.org/index.php?topic=397540.0

Thanks,
CoinPayments.net

so everyone who has not yet voted should get over there and vote for it to be added.