Something I noticed using Chrome:
You can clip to Findings.com from your https://kindle.amazon.com/your_highlights page if
- You are using Chrome and...
- You have the Findings Extension.
This won't be the same as the old synchronization of clippings, but you can add a note to identify the source. And once clipped it can be shared to your Facebook, Pintrest, Tumblr via Findings.com.