Can someone explain to me why sometimes I pay literally zero fees and sometimes this happens?
I’m using muun and WoS

Can someone explain to me why sometimes I pay literally zero fees and sometimes this happens?
I’m using muun and WoS

If I understood right: Muun uses submarine swaps to drop btc from main chain to lightning, which means that you pay for the channel opening transaction.
Some say that it is not a "real" lightning wallet.