Backpack rap is usually associated with individuals that do not want to be mainstream but instead voice their social and political ideas. The most popular backpack rappers who have converted to mainstream culture are Wale, Wiz Khalifa, and Kanye West. These rappers were once struggling artists that made songs that were truly about the art form instead of making a profit. Now, don't get me wrong I am a HUGE fan of all of them and they still make great songs, but you can definitely hear the difference in their songs once the checks and major record deals started coming in.
In the backpack rap subculture, the base audience usually relates to the theories or ideologies these rappers illustrate. These backpack rappers are usually underground rappers that never really gain commercial success. As previously mentioned Wale,Wiz, Kanye and Drake are great examples of the exemptions to this conception. In the backpack world, staying true to your beliefs is vital to your fan base and because of that many artists who have become mainstream have suffered a lot of back lash.
" people really hate when a backpack rapper get rich
and start livin’ that life dawg
feels like when you gettin’ to that paper hip hop hates ya
they would do it just like I do if they could
its in our nature"
Others like Childish Gambino took another approach to the criticism by basically saying FUCK YOU!
Also as rappers are enjoying the commercial rapper lifestyle, they are willing to ignore what others think and the sacrifices they've made. As Biggie said,"Mo money mo problems"
http://www.youtube.com/watch?v=f7plhrsQSEEhttp://www.azlyrics.com/lyrics/drake/showmeagoodtime.html
http://www.urbandictionary.com/define.php?term=Backpack%20Rapper