WTF
first of all YOU are underground, I am underground, and most rappers on this site with actual move making plans are underground.
Mainstream currently consist's of 50 cent, pall wall, ja rule, game,snoop,lil jon and everyone who seemingly doesnt give a fuck about hip hop as a culture.
So if your striving for your name to be along side them, then knock ya self out.
but remember bro, mainstream usually comes with a chart reaching track, which consists of a catchy beat, someone yelling YYYYEAAAAHHH!!! thru out it, and about 2% lyricism in it. Mainstream is designed to sell records, who buys the records? underage teeny bopping girls and pimple faced kids still having there dinner made by the ma, if you really want to appeal to that type of audiance, sure.
Underground appeals to those who actually appreciatte rap, as rap, underground are those who dont follow fassion trends,
who dont support one side of the 50 and game beef, and who dont actually give two fucks about the diffrence between underground and mainstream,but simply doing it for the soul purpose(whatever that may be to that emcee inparticular)
underground is doing it for rap, mainstream is doing it for mass appeal.