As I explained in several of the hubs, the money came from revenue sharing sites outside of HubPages, as well as writing guest posts on websites with a PR4. The reason I got to write the guest post was based on my hubs. My hubs have nothing to do with it, and I have spent very little time actually drawing traffic to my hubs because of the 60/40 split, HubPages was just a good platform for me to get recognition and help draw traffic toward other sources.
Thank you for being skeptical, because blunt honesty is the only way to make money online in a legit way - hence, I never tried to sell anyone some crappy e-book or anything, I simply explained my tactics. As you will see, my hubs in total have only received around 9,800 pageviews - the traffic was not from HubPages - in the month I made $1,000, I received over 300,000 page impressions through AdSense and had a CTR of around 2-3%, with the average payout per click of around $0.97, although some ads paid over $3.00 per click. The Google pay period ended and I had made around $1,215 on the check. The money was short lived, and I only made around $110 the next month around because I quit marketing.
The methods I explained are not new or unique to me - people that have enough time and energy have been doing this for years, and a lot of people are far more successful than I am, earning $10,000 or more in a month - I've even seen checks as high as $200,000 from AdSense. I simply thought it would be an interesting topic, and I got enough feedback from many users that they were indeed interested in it. I think, all time, my actual earnings from HubPages alone totals only around $40 - all the other money is from different sources.
Hope this clarifies things. For more info, read the Hub series in detail, and I have explained this and made no promises.