To make SDC and SDT really big, I would suggest to make ónly these currencies possible for transactions on the shadowmarket. Most optimal would be to built, some kind of easily to use exchange market; SDC/BTC based on bittrex prices. In this situation all people holding BTC can do quickly business in SDC. The next step might be to start a localSDC-site, so that people also easily can change there SDC for cash in their neighborhood.