Those popups were so prolific that all browser developers responded by implementing popup blockers.
Which kind of led to the absolute mess of banner ads (and the adblockers created in response) that we still have today. I dare you to deactivate your adblocker on any of the major (commercial) news sites.
Sergio@slrpnk.net 2 days ago
I read an interesting article about that: thehistoryoftheweb.com/ads/