You can already do this with nostr:npub1ajlrwgfj4yerhqf7ady03h7wmtk2qr3gs7h3sxcx83k05yld36sswpzx3q. I don’t think many do it cause the fees are too high for small amounts like most zaps are. Min send amount for Aqua is 1k sats because it doesn’t make any sense to send payments for less than that amount.