One problem I have with the external wallet is that when a zap is performed and there is SAT dust, none of the wallets I have configured to receive receive that dust.

They make me a Zap of 2 SAT, which should be 1.4 SAT for the 30% discount, but only 1 SAT reaches the wallet.

If that 0.4 SAT dust remains on the platform, I am happy. But that is something that does not happen when the Zap remains on the platform.