Marketing is very important. There are a lot of good singles and full albums by some Congolese artistes at home and in diaspora but the lack of proper marketing of the artistes and their albums is the cause of their failure to dominate, increase album sales or even get popular.
Look at Mirage Supersonic, Alain and Bouro especially on Mortel Combat, Kabose and all his albums, Sam Tshintu, Iyenga, Laurette LA Perle etc
Iyenga
Laurette