Do you have a source? Because companies generally care little for a tiny bit of extra cash like that. I assume the companies probably get paid in something, e.g. data as some other commenters suggested, rather than cash. While your comment suggests at least to mr that the payment is on cash.
Nah this is true. They don’t pay businesses directly but they’ll pay the software provider. The software provider will change their terms of service as innocuously as possible, get clients to acknowledge it. They’ll even add an opt-out option but few will exercise it.
How many businesses today actually run payroll 100% in-house? Almost none.