Not all wallets have NIP-57 Zap support. If they don't have Zap support, it's just acts as a Lightning tip. Tips cannot be tallied. Zap support makes Lightning tips aware of Nostr and integrates Nostr allowing them to be tallied.
Discussion
nice… this is gonna get interesting
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What I am finding is most have just sent ln transactions and not zaps even though they call it zaps and think they are sending zaps.
not enough toxic zap maxis yet to enforce the sanctity of the spec