Because I can't use it.
It's not free. I don't even need it for actual Multiplayer. All I want is to be able to use an iPad to control a custom display on a projector for a school project. I'm on a bit of a shoestring budget, you see, so I thought Construct 2, which I had used some times before, would do nicely. ($180+ AUD? )
But, after hours of work and some hard drive issues, I go to export so I can test the blasted thing (because testing over LAN is also not free... ) and I am finally told that the Multiplayer plugin requires the Personal Edition.
My biggest issue is that, prior to this incident, I had not been notified that this was the case. There is no mention of it in-program or in the Manual entry for the Multiplayer plugin. The first documentation (excluding the error) of this requirement that I could find was on the feature comparison page, which I had not needed to use prior.
You can understand, then, why I would be disgruntled to find out that my hours of work had been for nothing.
(Steam Version, Free Edition 212.2)