I've always done it because i love it. Rarely even charged unless i needed the money. Shit half my cd's were given away. Nobody is making real money of homeboy rap.. The cats you think are, actually hold good union jobs they support mass releases with money from real jobs. No norteno artist has been able to live off their rap money to my knowledge.. But to answer your other question. The reason why someone would pay $100. For a verse is because they want to do a song with someone they are a fan of. With hustle money is still made off music. Fans wanna hear certain artist together on a track that expands into others fan base.