The explanation for this at Wizzley says this in the Zazzle FAQ area:
To claim your share of ad impressions, enter your appropriate affiliate ID in your Wizzley account. It will then be substituted in 50-60% of the page impressions of your articles.
And it says this for other affiliate programs. So does that mean that the more affiliate numbers you provide in the Wizzley account the better the chance of having a page make money, or does Wizzley only consider one affiliate per page?
I'm not even sure I understand my question! But I originally thought that Wizzley was making something from Zazzle sales - not only the ads on the page.