I think ADP and Gusto forced their hand. They realized they needed to be in control of this part of their business, and while before they had planned it as an "eventually" thing, it became a material risk that was no longer tolerable. If I were them in the absence of the ADP shut down and Gusto competing head to head I would have wanted to focus every dollar on the core service and scale and kicked Payroll down the road. Makes sense in context they did it now though.