Facebook has been trying to crack down on text within images for some time. They made a big deal out of it when they first rolled out Timeline but it was still possible to get by without getting noticed. Today, it's a lot harder.

While I've never been able to fully make sense of the rule, it's their site so we have to play their game. The way the rule works is that text in an image cannot cover more than 20% of the total space or you won't be able to run ads on it. You might be able to run it for a little while but they eventually catch it.

They continue to push the letter of the law further. If you have too much text in your cover photo, all of your ads get rejected automatically. They've now started including thumbnail images from links in the rule. The post above was rejected for this reason. The sad part is that there were other images on the page that I would have preferred to use, but Facebook didn't register them as a thumbnail option.

Be aware of the rule if you're running sponsored posts on Facebook. This isn't the type of rule that you'd ever want to try to break. Even with a direct line to a high level Facebook employee, it still took a couple of days to get a client unblocked who had been breaking the rule before we took over the account. I couldn't image how it is for those who have to try to plea with them if they didn't have a connection.

It might not make much sense, but again I'll stress - their site, their rules.