I consider imgur a poor choice because it doesn't work with JavaScript disabled (dunno how Drive, Dropbox or Photobucket do, just that imgur breaks). It's in the business of serving JPEGs and HTML containing <img> tags pointing to JPEGs; to break that HTML such that those JPEGs don't serve is failing to deliver on its core business.

Sure, use JavaScript to implement infinite scrolling or on-demand loading, but fall back to usable pure HTML.