@judk's comment should be higher... it is the unfortunate cycle of ad-supported startups. imgur grew out of the garden that is reddit; it was suppose to replace all those other crappy hosting services. It's been known for a while that directly navigating to a i.com/direct-link.jpg link costs imgur because they get no ad impressions from those loads. While I think this is the eventual trend of every imgur page load, t…
Semi-OT, but: Considering how much reddit seems to depend on imgur and image hosting in general, how long will it be until reddit handles the image hosting themselves? Sure it would add a ton of new costs and headaches (takedowns, etc), but don't you have to have a plan for this if you're Yishan? Imgur hasn't exactly been subtle about adding reddit-like features (comments, comment ranking, categories, etc)..
Reddit gets the traffic, imgur pays for the bandwidth and compliance.