Oh my god.... this was actually planned?
And dropped again?.... :'(
If MP was such a big wish, why do you think there's no one actually using it?
You have to consider that MP games are not that easy to code/design, so it will take much more development time.
Or do you see that on the signalling server logs?
However considering the fact that the MP feature is still pretty young, i doubt that there are much MP games out as of yet.
If you look at the guides, they have quite a lot visitors and it is not even 1 year old.
Me (for example) have only bought Construct 2 because i knew that it is even able to create multiplayer games.
I'm currently working on quite a big Desktop Game project which is all about multiplayer.
So before you're ever going to see this as an actual release or open beta you would have to wait for another 2~4 years maybe. (once i will be that far i will buy the signalling server anyway.)
I would also be willing to pay a higher price on the signalling server if it's offering me such great features.
With that dedicated servers wouldn't appeal me that much anymore.
I think you should still consider developing the multiplayer much further than it is now.
I haven't seen any updates on it since it's initial release, while i was reading about a few bugs on the multiplayer itself.
Like not correctly syncing players position due the Local input prediction.
For some games it might not be a big deal, but other games may be designed were this would be required to be more exact.
I have some smaller issues my self, but i'm not giving up on it, i'm sure i can improve it ones i'm further with the game.
I hope you haven't dropped this idea entirely.
I guess this was only planned as subscription anyways. It would be freaking awesome to buy such an advanced signalling server for ourselfs to host it on an own server.
In the end, it's your ultimate decision.