Work with many or fewer sponsors?

[Agent]

Okay, I've been in this game for less than a year. I run five sites (two of which are new and have not been developed into anything worth visiting yet).

I actively promote six sponsors across these five sites.

one general porn link lst
one milf site
one reality porn site hub
one asian (new, not developed)
another general porn hub (new, not developed)).

I want board member's opinions on whether I should be sticking with a handful of sponsors or should I be joining many and promoting sites from a larger pool...

I know most of my sponsor's inside and out, that's easy - I work with only a few. Should I bite the bullet and start working with a larger heap of sponsors?

I can see where this will benefit me with, lets say, the Asian hub. The more sponsors I have to work with the more asian niche sites I have to promote. But on the other hand, if I'm working with 20 sponsors I may be seeing less cheques waiting to hit their minimum payout.

I'm looking for opinions from webmasters, not sponsor program reps. I'll find you guys through the board's adverts and sigs when I'm ready

Thanks