Get a real job!
Actually a lot of the top hubbers blog and have marketing or other online businesses or write freelance or professionally.
At the moment I work in a electronics lab and they are laying off staff left right and center.
I am kinda disappointed they haven't got to me yet as I am starting up a small business marketing firm and could use the extra time to get stuff done and get the ball rolling.
I also trade and invest in the ASX.
It pays not to have all your eggs in one basket if you know what I mean.
I hub mainly for fun but I get a kick out of making money from it as well.
I really get a kick out of getting hubs ranked on the first page of Google in less than two weeks, some say it can't be done but actually it can as long as you don't target high competition niches.
Amazon sucks cos browsers block cookies a lot of the time, so Amazon earns much less than adsense, for me anyway.