Yup. Here’s how I understand the flow of events:

1. YouTube hears about Grayjay app
2. YouTube sends threatening letter
3. Rossmann responds, essentially saying: we never agreed to your TOS and we don’t use your API
4. crickets
5. Repeat step 1

I doubt this will go anywhere unless Grayjay gets popular, at which point we’ll see the lawyers gear up for a lawsuit.