There's a good chance that people from other countries (which is most of the world) haven't. I only knew that show existed because of a TVTropes page (https://tvtropes.org/pmwiki/pmwiki.php/Main/SeinfeldIsUnfunn...), and that page is the only thing I'd seen about that show until today.
There is little in life more subjective than humor. These are spreading like wildfire on reddit this week, and now they've shown up here. I'd say it's safe to assume these "are funny," at least to someone.
