This will always be the problem with trials. Anyone with a job, often underemployed between software roles these days, will be excluded.

Still, it does benefit the hiring company, just not the applicant in these situations.

> Still, it does benefit the hiring company

Not sure it benefits the hiring company when they are artificially reducing the pool of applicants to only people who don't already have jobs.

Not that there's shame in not having a job, especially in today's market (shit happens, I'm sure lots of very qualified people are currently looking), but there are solid statistical reasons why social proof of already being employed is seen as a positive.