if you don't setup your Google affiliate settings, the ads still show automatically and the revenue only goes to hubpages. If you enter your Publisher id on affiliate settings, clicks are 100% yours and impressions are 60% yours:
to setup your Google Adsense affiliate settings:
read this from hubpages FAQ
How do impressions generate revenue on HubPages?
After you’ve joined the affiliate programs from eBay, Amazon, Kontera, and Google, ads for these companies appear on your Hubs. Any revenue generated during one of your impressions (a click-through with Google, an actual purchase with Amazon or eBay) is 100% yours.
HubPages splits the impressions with you in the following way:
1. Your own Hubs: Hubbers receive 60% of total impressions.