you gotta remember, lynch was young and this rap income was his only way of paying rent, buying food, etc.....as much as it sounds like he should have made, fact is, he was probably living about as well as someone with a $20/hr job...
For some reason I never got the impression that Lynch had a large amount of money....im sure he was comfortable for a few stretches and didnt need to sell features (IE: hard times=like the whole Lionfromthelake collabo hahaha)
I know more than a few people that have said Lynch wont answer the phone or always makes excuses about doin verses or only replies with weird random text messages that dont make sense...even when there is plenty of money on the table
So i dont think he ever became "rich"...but i think he made enough to turn down a shitload of verse knocks