You could filter out zaps from npubs to prevent abuse, but then it seems easy to create another npub and zap from another account
Tricky problem
zapping your own tracks on nostr:npub1yfg0d955c2jrj2080ew7pa4xrtj7x7s7umt28wh0zurwmxgpyj9shwv6vg to boost it into the top 40 chart is lame. cmon guys. do some promotion and get some real zaps on your songs.
You could filter out zaps from npubs to prevent abuse, but then it seems easy to create another npub and zap from another account
Tricky problem
They are zapping from different accounts, but it’s still pretty obvious