Perhaps Traxys wanted more or even 100% of the scandium, but at unacceptable prices per kg. The 10% was to get some sort of offtake in place to start things off, and Nio would have liked to sell more, but not at bargain rates.
I believe that the offtake agreement prices will remain confidential because they are agreements between entities and not based on market prices like the niobium offtakes, so we may never know.
I appreciate the follow up efforts, please keep us informed on any answers you receive, I had that exact takeaway as well.