Breaking down or "decoding" religious texts, teachings, and philosophies have been done for a long time. Many religious teachers tell there students to try and break down texts on their own as it helps them gain a unique understanding of what is being taught to them and allows them to identify the religion as their own beliefs. As an avid rap listener we are usually able to break down lyrics on our own because we understand the patterns and word play that rappers use, this allows us to have a greater appreciation of the music. People who don't listen to rap can't do this which is why rapgenius provides the service they do, to give those who don't have the context to fully appreciate the music.
Seeing how 5%'ers have had some influence in rap music since the late 80's I'm sure there are a lot of people (specifically white folk) who only heard of the 5% nation or their teachings through references in a rap song. This puts rapgenius in a position to provide some basic context on the 5% nation to visitors to the site who may have heard about them or heard some of their teachings in a song, but have no clue as to what their teachings are or where to even begin to find it. As long as all the content is monitored to make sure some lowly cac doesn't go filling the entries with bs this is probably a good look.
Just my 2 cents
Then again that 15mil could be from some shiesty figure, honestly you never know in todays world