IntelliTXT
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IntelliTXT is a piece of adware developed by Vibrant Media. IntelliTXT is a script that website authors insert into their pages that will find keywords on the page and double underline them when a viewer views the page. When holding the mouse over the double underlined link, an advertisement associated with that word will pop up. Advertisers pay to have their ads associated with particular words. "Context" is considered ensuring that the ads are relevant to the web page hosting IntelliTXT. The liability of this feature is that it makes pages more difficult to read; scrolling down the page may inadvertently cause delays while random ads flash on and pause before disappearing.
Publishers choose to run IntelliTXT advertising campaigns on their websites to generate advertising revenue. Some publishers choose to offer a help link inside the IntelliTXT ad box that leads to a page that offers to let you turn off IntelliTXT. Note that deactivation requires the use of cookie technology. If a user deletes or refreshes their cookies the service will be re-activated automatically and ads will continue to appear on the page. Also, many publishers have a short expiration date on the cookies, so they annoyingly keep coming back after a couple of weeks or less. Most egregiously, since the cookie is stored by publisher, it also means that turning off the feature for one publisher has no effect on the other publishers that use these popups.
Some users use ad filtering software to block IntelliTXT ads.
Competitors in the in-text advertising space include Ontok and LinkWorth.