I didn't respect it when the Canadian Jew got exposed for doing it, and I damn sure don't respect it when someone from my city exposes himself for doing it. Your job description is simple. Essentially write your rhymes, perform it, and send it out to the masses for consumption. If you needed someone to ghostwrite one of your 'sellout/crossover' songs, then obviously that either simply isn't your lane to be in, or you're not talented enough yourself to be able to crossover in that lane. There's been records throughout hip-hop history where you can tell & hear an artist having an influence on countless others, but it wasn't ghostwritten. They just took the formula of what said artist did and added their own twist to it.
"It's fun doing it?" 
I bet seeing as how you're not doing shyt yourself on the record
R.I.P