I'm just now seeing this thread. The quickest way to get a hold of us and speak to someone directly is by contacting us through our support center.
For everyone that listed their domain, I've checked the data on our end and am performing new crawls to update our data with any changes that may have caused your page data to no longer be synced with your current settings (which are stored under a unique API key).
If you upgraded from version 6, the data on our end would not have updated to reflect this change. Also, if you pressed the reset button on the Advanced Settings page, this would stop recommendations from showing on your site, because a new API key was generated at that time. These are two specific instances that cause a syncing issue with the data we have cached.
Now, after running a new crawl for the three sites listed in this thread since we last commented, check on your site in a few hours (no rush), but make sure to empty all caches before flipping through your content, and you'll also want to check for recommendations on both older and newer content.
If you are still running into a problem with Related Content visibility, please contact us directly through our support center for personal assistance. Make sure to describe the problem, any relevant details, the URL of this forum thread, and include your website address. Thanks!