1) If you're choosing a payroll provider, Zenefits integration may help you choose ADP because you have a non-awful user experience with Zenefits as a front-end.
2) It could run afoul of antitrust law for tying, monopolizing, or the essential facilities doctrine (http://en.wikipedia.org/wiki/Aspen_Skiing_Co._v._Aspen_Highl...), if the case could be made that ADP has sufficient market power.
1) If you're choosing a payroll provider, Zenefits integration may help you choose ADP because you have a non-awful user experience with Zenefits as a front-end.
2) It could run afoul of antitrust law for tying, monopolizing, or the essential facilities doctrine (http://en.wikipedia.org/wiki/Aspen_Skiing_Co._v._Aspen_Highl...), if the case could be made that ADP has sufficient market power.