We're running some experiments Answered
As the economy ebbs and flows, so does the advertising industry. Since Instructables' only current sources of revenue are contextual and brand advertising, our future has a few more question marks than it did a few months ago. We're currently engaged in a number of experiments to see how some of our ideas around alternative revenue sources pan out. For example, we're currently asking non-logged in users to create an account to access all of the large images in an Instructable. Whether we decide to make any of these changes permanent depends on how they perform, feedback from the community, and if and when brand advertising picks back up.
Advertising underwrites the creation, hosting, and distribution of a tremendous amount of awesome content. Keeping that content flowing when advertising has a down turn requires some creative thinking, and often requires business models that are not free. While we have no plans to charge our community to submit or get access to the Instructables content (because really, it's your content in the first place), we are experimenting and thinking about premium models around how that content is displayed and other features you may find valuable.
If you see something out of the ordinary, please give us the benefit of the doubt while we experiment to find ways to ensure we're around for a long time to come.