Did you read this? It says minimize usage.
> A defining phrase is essential to the meaning of the sentence. The following examples show how the Oxford comma can affect meaning, using the defining phrase ‘for stockfeed’.
Seems like it provides a clear cut framework for when to use it?
- Do not ever use the Oxford comma.
- BTW, in case you don't know what an Oxford comma is, here are all the reasons why the Oxford comma is great.
They do this in other places too.
But putting that aside, the issue is not whether the Oxford Comma is preferred: it's what this website is actually instructing bureaucrats to do.