Abstract: Systems and methods are provided for selecting content components to include in portions of a content page under various constraints and according to various effectiveness considerations. Organizing the content components may include considering the expected user engagement with the content components, while simultaneously endeavoring to comply with certain content constraints imposed on the system. The content constraints may be complied with to the greatest extent possible before the expected user engagement with the page is adversely impacted to an unacceptable degree. The content constraints may be imposed across an entire set of content pages, such that only the content pages in the aggregate are expected to comply with a global constraint. This allows for maximizing the expected user engagement while assembling a content page without unduly constraining each content page, where those global constraints may be known to reduce expected user engagement in some instances.