Can you add the Yummly button

If you would like to submit a service for the widget could you please submit it here: https://sharethis.com/publishers/submit_service
Our production team will consider that service and try to add it in ShareThis, in future versions, if it satisfies all the standards.

We don’t know ETA on adding a service to ShareThis.
We will let you know once the product team confirms about it to us.