I loathe having to delete internet history for the same reason. I'm not against someone trying to make a buck - I'd do the same thing - but they have crippled the site with bogged down load times. They also replaced the old smilies, and the new ones take curiously long to load in your response window. This is the exact way how not to run a website, imo. Not that my opinion means anything, but its pretty fucking ridiculous. Another major problem is its infrastructure is too graphic-intensive.
If I had never been to the site before, and came upon the homepage, I would leave immediately, its that bad.
I manage websites for over a dozen non-profit societies, and I know thats small potatoes, but our webpages load up almost instantaneously- even the ones with animations. And some of them serve quite a few scientists and researchers. The more dominant societies have ad space; all run off an unobtrusive javascript window on the right side, that is, for the most part, global. There are like 10 15kb images linked to their respective companies. It takes like a nanosecond to load.
Since Headfi pulls so much weight, they should just charge more money for less dedicated add space, and run 25% of what they have running now. They'd bring in the same money and have a much better website. Its stupid not to do this.