After crying and fighting in the press like little babies, Google and eBay called it a truce and quietly put in place a partnership over the paid advertising space on eBay's website. Previously, this advertising space was filled with ads coming from Yahoo!'s Right Media Exchange, but since August 26th these ads seemed to have lost their grip on eBay.

The Rimm-Kauffman Group, a paid search marketing service to online retailers, reports that a few months ago eBay started testing Google ads on 1% of its advertising space, percentage that has rapidly grown since August 26th, when eBay seemed to have decided to shut down the Yahoo! operation.

Earlier this week, the agency has observed a staggering 90% share of Google ads being displayed on eBay, practically confirming the end of an era for Yahoo! at the e-commerce giant.

Some worries were previously expressed around the online marketing community because Google's stiff services were not too permissive in managing ads and ad space, unlike Yahoo, which offered a feature that allowed advertisers and clients to ban or block certain types of ads from being displayed.

With today's release of the Google DoubleClick Ad Exchange service, those critics are certain to have lost all their arguments, Google providing a smarter Ad Review Center for their Google AdSense customers that is sure to rival and even surpass the performances of the Yahoo tool.

More conclusions can be drawn from this change of “ad work-horses” at eBay that can be easily extended to the whole online advertising community. Google is heading straight forward on all cylinders toward a monopoly if it manages to beat out in quantity and quality all of its opposition. No one is even close at this moment to Google's services and we are beginning to realize this. What remains is for the search giant to find a way to avoid squashing everybody else on the web while it grows bigger than life.