I am designing a project which involves some ppp related applications,
and for some reason, I wasn't able to find sufficient information
regarding the popularity of Microsoft RAS Server.

I do not conduct a scientific survey, or something like that, but I do
need to get a general picture. My unknowns are as follows:

1) Does RAS provide any competition to Linux pppd / Hardware solutions
(cisco, etc.) in the ISP world?

2) How popular is RAS among small businesses ?

3) Is there any 3rd party solution for a PPP server on Windows ?
I would appreciate any help,