It may be illegal, but there's no mechanism to prevent them from doing it. Because the consequences for doing the illegal thing is less impactful than not doing the illegal thing.

It's a financially responsible move to break the law when the consequences are so minor.

It's illegal like speeding is illegal. Yeah, there's consequences, but most people still do it every day regardless, because the consequences (and likelihood of even having to face said consequences) is so small.