From a business ethics and security sense, I'm on ADP's side here. However, this type of press (or awareness) from ADP customers' is what makes this move smart:

From a business ethics and security sense, I'm on ADP's side here. However, this type of press (or awareness) from ADP customers' is what makes this move smart: https://twitter.com/AaronKlein/status/607051950928953344 https://twitter.com/AaronKlein/status/607051950928953344 Imagine Zenefits was simply a broker and your broker said to you "ADP just shut off my access to them so I can't use their service, how about we use XYZ instead?". As long as I trust my broker is providing value then it doesn't matter what payroll service I use. So, if Zenefits is confident people value their service above the service a payroll service provides, then they will most likely win in this case.