Most likely a green card application related sham job posting where they already have someone working in that position on a work visa for several years with experience with their internals and doing a good job, but the regulations force the company to post their job at several places, interview people and reject them for some plausible reason, while applying for a green card for that person. All this needs to be documented properly.

It's extremely common at most companies, including MFAANG, because it makes zero sense to layoff the incumbent and hire a brand new person.

https://old.reddit.com/r/LifeProTips/comments/jy5rcw/lpt_bec...

Facebook got caught.

https://www.theguardian.com/technology/2020/dec/03/facebook-...