Switched hustles, been killin' em ever since
It pays to tell the truth, dog, it only makes sense

from Jeezy (Ft. Jay Z) – Go Crazy (Remix) Lyrics on Rap Genius

Meaning

Ever since he stopped selling coke and started rapping, his life has a new meaning: things make more sense

However, rapping pays considerably less than drug dealing in the post-iTunes Era: it only makes cents (get it?) not big dollars

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