You know that page where it says it is doing the price comparison in the background? That's where it always stopped for me. Frozen, never updating.
Last month, I was travelling again and went to kayak just to check. I get to that page and it's frozen again. But this time i notice the little red X on the top right corner of the browser.
> Popup blocked
I went to the next website of course, but it makes me wonder. How much money have they lost because they decided to use pop-ups for no good reasons?