Well, first of all they'd have some obligation to ascertain that, and that alone won't come cheap. Effectively, Rebecca was likely more productive than the law

Well, first of all they'd have some obligation to ascertain that, and that alone won't come cheap. Effectively, Rebecca was likely more productive than the law allows, so they would need to provide her with ridiculously outsized benefits even though she is clearly a genuine independent contractor, and it's likely that other contributors were also too productive for the law. Though, and this bears repeating, even figuring that out is going to be very expensive.