I’m happy to be wrong about this, thank you for the link. It’s new information from the top linked article that pro bono would be allowed. I would speculate the

I’m happy to be wrong about this, thank you for the link. It’s new information from the top linked article that pro bono would be allowed. I would speculate there’s maybe a big enough caveat in there that the university knows makes a pro-bono arrangement unworkable while appearing to be flexible. “On their own time without using university resources” could mean it’s not actually possible, and doing it pro bono obviously doesn’t change how the university feels about the case and it’s potential harm to their interests. But if the university really means it and would allow the testimony without repercussions, then the situation isn’t as bad as it seemed.