I Won't Hire People Who Use Poor Grammar. Here's Why (hbr.org)

This has become a negative filter, too. Good grammar these days is usually simply an indicator of AI use.

2012

It's telling that nowhere on their site do they bother to say what the letters HBR stand for. If you don't know or use 'poor' grammar it's not for you. However English is defined by it's usage so no one can be the judge.