I use Payoneer's MasterCard and most of the freelancers from all around the world too.
Whenever I add my card, I get an error of non-supported card type. What's more, DO requires all the PayPal accounts to be verified for shipping. Really??
I know, this could be security but what about countries where PayPal is not supported and only way to pay and get paid is something like Payoneer.
I got my account suspended just for these reasons.
Please have a serious look at it. I love DO and I don't want to leave it.