Yahoo has announced that it will make more pacts with companies that specialise in pop-up window advertising.
The company said that it has signed deals with rich media web advertising specialists Eyeblaster, EyeWonder, Point.Roll and Unicast to incorporate their technologies into online advertising.
The four companies develop pop-up adds that are difficult for surfers to ignore.
Eyeblaster creates animated pop-ups, while Point.Roll's technology causes smaller ads to expand within the web page when a user moves the mouse over them. EyeWonder and Unicast develop streaming audio and video messages.
But Yahoo may be taking a big risk by extending the use of pop-up ads. Surveys in the US have consistently listed pop-up ads as the most annoying thing on the internet next to junk email.
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