In my experience these kind of companies attract either juniors or people who cannot afford to work for a 100% remote company (because they cannot pass the interview). It’s like the Nigerian prince scam: the emails are written badly on purpose because they are targeted to those people who won’t realise about the nature of the scam.
Just keep in mind that most recruiters get paid when they place someone.
So -- at least a few years ago -- they were trying to cast a wide net and get as many interested leads for the job as possible. It's just a numbers game for them.