If you read the tweet thread, apparently you can track the transaction, for instance if you send a specific amount of sats and then check sparkscan, you can track and link it to the receiver
Discussion
Yeah. It’s a bit harder to do though. I don’t think nostr:npub1u8lnhlw5usp3t9vmpz60ejpyt649z33hu82wc2hpv6m5xdqmuxhs46turz's tool works with Blitz wallet invoices. It’s super simple to do with WoS invoices.
It's an option to turn off when creating an invoice with spark. For whatever reason WoS chose to keep it on