Here is a quote from Jakob Neilson, a leading web usability pundit, with an expertise based on human factors engineering:
"Ultimately, the fact that online ads get viewed more when they match surrounding content is a strike against the tendency to build advertising networks. If advertising spots are simply auctioned off, then you can't design an optimized ad for each placement.
When you advertise through an advertising network, your ads will get fewer fixations than if you contract directly with the publisher for a specific placement and design your creative to fit that spot. As a result, you should bid less for network ads than for customized ads that you place yourself."

Google Traffic/ Rankings
Calculateforfree and the affiliated web site, Calculateitnow.com, are among the most popular web sites on the internet for calculator needs.
 
This page often ranks #1 or nearly #1 on Google for the phrases "Calculator" and "Online Calculator" with over 1,000,000 page views a month. Click here and here now to check the current rankings on Google for these phrases. Our visitors come from all walks of life including Banking, Real estate, Lawyers, Engineers , Medical Field, Schools, Colleges and many more.

Sticky Web Sites
Calculateforfree.com and Calculateitnow.com are both "sticky", What does that have to do with Web sites? Well, in the Web biz, "sticky Web sites" are those you want to go back to again and again. Why are return visitors good? The more they visit your site, the more they rely on you, trust you, and have equity in your relationship. That means they'll come back and buy more goods, get more advice, and see more ads. What does that mean? Stickiness = relationships = loyalty = revenues.

Advertising Policy
As a matter of policy calculateforfree.com will not accept advertising for adult material, tobacco, firearms, or alcohol. Additionally we will reject advertisements on our site for products which may be acceptable but where the ad creative is suggestive, offensive or deemed unacceptable in some way. Should the content of your page change and we feel it has become questionable or offensive in nature, we will terminate the ad without prior notice to you. Ad colors must blend with web site. All prices listed are estimates only and will be determined by ad location. Full payment is required before ads are posted. Payment may be made by check or money order in US currency drawn on a US bank.