You are pulling those numbers far, far out of your buttocks. The total number of servers that shut down couldn't have had been hosting more than 2k total active players, period, when you allow for multi-clienters, and you appear to be playing some other Oath. Most of the servers that have closed had active median member counts numbered in the low double digits.
More important than any of this: what you're looking at is the natural evolution of a private server community. There always, and I mean always, comes a time when the rights holder of the title goes s***, typically in a moment of weakness, and attacks their own fanbase. It happened with World of Warcraft. I'm confused it took this long for Gravity to wake up, honestly.
The end-state is private servers hosted in countries that completely ignore takedown requests and offer no legal remedy to companies seeking to enforce IP rights of any kind, run by people who keep their identities hidden. All of this has happened before in other games. There's nothing IP holders can do to stop it. It happened to WoW, now it's happening to Ragnarok. It sucks that we lost some good servers. Life goes on, and so does the private server scene.
You'll get over your personal loss. I did.