If my understanding is wrong is this a marketplace where you can offer goods inexchange of crypto? What altcoins are listed then?
UBcoin is platform which we can exchange real goods and receive crypto currency. And as i know so far, maybe it is only major crypto currency beside UBCoin tokens.
as far I know Ubcoin has no plan to have their own exchanges from other coins to Ubcoin and you need to convert it first to other exchanges to have your Ubcoin token as this Marketplace platform will only accept Ubcoin token as payments. I'm hoping in the future they will consider this to make it convenient to consumers.