Pop ups may be your worst marketing choice

"the pop-up window is the pop-under advertisement, which opens a new browser window hidden under the active window. Pop-unders do not interrupt the user immediately and are not seen until the covering window is closed, making it more difficult to determine which web site opened them."

This marketing fad is as annoying as junk mail ( inbox and snail mail box ) and spam.

Free Pop-up blockers free up users time Xing out pop-ups.