Anyone who feels comfortable with that risk, because of his measures for anonymisation of the mint ownership, or his expectations of profit, or because he feels he is legally covered. Other reasons could be ignorance or unawareness of the risk, or for activism. Even apart from the last one I think we get plenty of mints.

Because of ecash characteristics, with at least some trust involved, and it just being text there is plenty of ways you can disguise your mint and you would need to have total communication crackdown to prevent transactions.

Even though its technically not a layer of Bitcoin, anything that can reduce the load of transactions on Bitcoin like cashu could do is important and not a distraction IMO