Hosting a Private Server takes effort. Most computers can't run a server that Kabam pays Amazon and Google hundreds of dollars to host, so they crash very easily, and even easier, thanks to morons. Unless you have no life or are an insomniac, you can't moderate/reboot/troubleshoot your server 24/7. Most people have jobs, social lives, and better things to do. Also, you're are surrounded by idiots who are going to say "LOLOLOL GAIZ IM GUNNA SPON 1000 CYOOB GAWDS! WTF WHY DID IT CRASH UR SERVER SUX!!!!!". If you turn Admin privileges off, players will get bored, as it is just like prod, but with less people. I hosted a server for a while (I was actually one of the first few people to do so), but after I closed it, people continued spamming the thread with "LOADERRORRETRYING UR SURVUR SUX ITS BROKEN." and "Y IS THE SURVUR NOT WURK HALP ME PLZZZZZZZZ!!!1!!!11ONE!!"
TL;DR (I tried to embed a Teal Deer here)
Host your own server. Try it. You'll immediately understand why most servers are offline most of the time.
(Resisting the urge to comment on the fact that you are a Brony.)