I think that it was because of the big campaign of Maison Mere & Fally Ipupa-fans did on youtube, facebook, etc. to influence people by bad comments and it worked the first year, but after it people started to discover the album slowly and started to change their opinion. Heritier didn't help himself by focusing to much on polemic (letting his spokemen react against Sankara and co) and himself answering questions about Maison Mere. Also those two sextapes killed the promotion of his album.