How are these generated? They seem to have errors that neither a computer nor a English-speaking human would make. They're sort of like how a child or a person unfamiliar with English might try to transcribe words they don't recognize:
>Dugan: That's Sam, the new girl in the counting.
...
>Sam: Everybody told what a catty shrude you are. Your horrible!
Why do you think these are generated? As far as I can tell this isn't a parody site. The domain was registered in 2003 and the design clearly reflects that era.
They mean the transcription not the general content. "shrude" ("shrewd"), "in the counting" (probably "in accounting"), and other transcription errors occur in that linked script, as examples. There also appear to be missing words in some lines.
>Dugan: That's Sam, the new girl in the counting.
...
>Sam: Everybody told what a catty shrude you are. Your horrible!
https://www.seinfeldscripts.com/TheSummerofGeorge.htm