Here's a link to the YouTube lecture just in case:

https://www.youtube.com/watch?v=Ow2ZmBmDaNo

Maybe it's only triggered intermittently? Last week I found a site that when I visited, it directed me to one of those "you've made the 5 billionth search! claim your prize" pages. After reloading a few more times, I was able to get to the actual website.

I just tried visiting the site again, and was able to reproduce this issue. Looks like it's a Drupal 7 site.

I was alarmed because I've seen this kind of behavior on malware infested computers, but I'm running linux and I double-checked my browser extension and proxy settings. Haven't seen this behavior on any other site.

Huh. I didn't see the popup.

Bastl Instruments is a really cool company. I've build 6 or 7 of their kits, super fun stuff with great docs and great sound.

Didn't get any popup either, guess they'd resolved the problem.