Until you reach 75, your outgoing links are NoFollow, and that COULD affect incoming traffic to some extent, but if you have a great hub, that effect would be minor and you'll probably climb beyond 75 quickly anyway.
Adsense income is a numbers game. The more visitors, the more probable income. It's as simple as that. Anything that gets more eye balls is likely to make you more money. Anything that interferes causes the opposite.