For companies whose advertising falls under FDA oversight, this is a change. Metadata used to be pretty much ignored, whereas on-page content has always had a high level of scrutiny. Now the issue seems to be that widgets of various types can surface metadata in the content area.
Funny that meta descriptions in search results have always sort of slipped by and are still not directly mentioned. So I'm still not sure that the FDA is really up to speed, technically, on what's happening. Meta descriptions SHOULD always have been under the same scrutiny as visible content.