correct me if I am wrong:

1. why would I run a cashu mint node (receiving ecash as fee) instead of a lightning node (receiving btc as fee)? Assume the lightining node is behind TOR an/or VPN

2. where does the BTC fee that I would receive running a lightining node go? If that's not a thing, how does it work (minting ecash should be possible at some cost, right?)?any specific doc?