Yahoo's bash on Web 2.0

Recently i was reading a bizarre news that Yahoo Inc. applied for a patent which claims that the company first invented web 2.0. in '90s.This patent is about "Dynamic Page Generator" that lets a user to customize a webpage template to displays data drawn from other sources.But to the fact Yahoo upgraded it's mail service to Ajax based only recently.If the patent is granted then many web 2.0 companies will be left in jeopardy.If Yahoo wants to do serious Royalty business with this patent then it's more frightening situation.'Coz all web 2.0 companies runs on advertising dollars and most of them still don't have any business model.In fact this can have a big impact on aspiring web 2.0 companies too.I don' understand where from these guys can bring royalties to fill Yahoo's pocket.Yahoo should understand the situation and let away all web 2.0 companies in the interest of future of web and consumers.