The folk music of slaves brought to Latin America and the Caribbean islands is closer in sound to its African roots because of two reasons. First, the cultural practices of the slaves brought to North America were suppressed. Second, slaves in Latin America and the Caribbean were allowed to play drums.
Companies usually like this reach out to you if you want to get signed up with them. You have to release songs and get recognized. Based on your talent and singing or rapping rate is how you get in.