It has it's positive sides and it's negative sides, as with all industry.
The positive is that it reaches a wider audience and with conscious rap that is a good thing. Also the more popular it gets the more money it generates for people whose only route out of poverty is music or sport. That's the appeal of hip-hop, it's open to anyone you don't need any money to get involved. And you also don't need any talent really to get involved, obviously to be a rapper you do, but not to be a part of hip-hop.
The negative side is that with money and popularity comes big business. When black people were the only ones prepared to put money into hip-hop and it was black owned labels who were the major players, hip-hop was pure. It still meant something, with the money and increase in popularity the history is being ignored. Hip-hop now is the name of the music, not the name of the culture. It is music about guns and "bling". There is also a template that everyone follows, there's no diversity or originality. All that matters is record sales and that suffocates creativity. The real hip-hop heads get ignored, the music that gets played is that which generates money. And with the money coming from white teens, the white teens are targeted. They fantasise about the glory behind gangs, guns and money. Hence 50 Cents popularity.