Ecash sats work better for very small payments. With Phoenix Wallet charging 0.4% plus 4 sats per transfer, sending less than 100 sats isn’t practical.
Discussion
Usually these have fees because they are providing non-custodial lightning solutions which have onchain fee cost. Comparing this with a custodial option doesn’t really make much sense.
You should compare it with custodial lightning instead, which typically doesn’t have any fees (coinos, wos). The only benefit at that point is privacy for users on the node.
“You should compare it with custodial lightning instead, which typically doesn’t have any fees (coinos, wos). The only benefit at that point is privacy for users on the node.”
Looks like you’ve already answered your own question.