Zap not showing for certain users

[Giszmo]

I am under the impression that some users being zapped do show up while others can't be zapped. For example:

https://habla.news/a/naddr1qvzqqqr4gupzptl6xgqam2u52sknn42kd6awt60p3ldd5ngq7338jq58uw2pyxkqqqnxzmnywfhkjep0vdhk6tnvd9mxjmn8wfhk7mt0veekzar0wd5xjtnhv9kxcet52n0r2r to me shows no zaps, same as another of his articles I zapped, yet on NoStrudel: