Why is the platform installer installing pscp when Cygwin openssh scp is also installed?

Why does the platform installer install putty's pscp.ese when it also installs Cygwin's openssh which includes scp?

A while back vagrant-service-manager had a dependency on pscp.exe for copying certificates, but I believe that was eliminated a while back. (around the time of the rename from adbinfo to service-manager).