To my knowledge, it's just due to rounding due to the tiny size of the transaction.
Hey nostr:nprofile1qqsvf646uxlreajhhsv9tms9u6w7nuzeedaqty38z69cpwyhv89ufcqpz9mhxue69uhkummnw3ezuamfdejj70v5n7z or nostr:nprofile1qqsvn0dkjt80raqrxd470c98n7zrdehmcvj6p5hgw3kyku6zyd8z0fqprpmhxue69uhkv6tvw3jhytnwdaehgu3wwa5kuef00gat3s why does the #bitcoin exchange rate show $140000 when I use strike to zap on #nostr?
Discussion
If your transacted arount is so small that it doesn't divide easily into cents, the rounding of the price will have noticeable affects on the purchase price.