This is gud. But I don't think the way the lighting network works in other non custodian wallets will be the same way Binance will also use it. Binance is a centralized exchange platform which is mainly for business and profit making. So that free transaction that happens in other wallets might not happen in Binance because they need profit in dealings.
And one thing I always afraid of using Binance to send coin is the transaction fee. Their transaction fee na to kill person oboy. But e fit bi sae LN can reduce it.