Is it possible to make multiplayer games with MiniScript, using Mini Micro? And if it is, can I get, like, 10 players togheter or are there any limits?
It's possible if you can write your own server to pass the data around, or find some existing web service you can use. It will not be super speedy, so it's best for turn-based games. There is no hard limit on how many players you could support this way.
That idea you had of a social MiniScript MMO... how was you going to make the server?
I'm not sure. I might just use PHP, since I'm already familiar with it, or in C++, which would be more performant and might also enable server-side scripting.
Then you will write the server?
I would, if I were going to pursue that project.