I'm not the one hosting it, I'm wondering if there are any other servers like it.
Minehut and Aternos are both 3rd party services. Both are free to use to some extend, unless you want to upgrade.
There are some other free server hosting websites, you can find them with google and yt.
What i like about Aternos is, that you can add a lot of plugins and mods!
These server are free becouse the hosters get money from showing you advertising as well as people buying upgrades for their servers.
The advantage of using a free 3rd party server is that everyone who has the account name and password to the server can launch it from the server hoster, wich is online. So if you want to play and everybody is already alsleep, you don't have to wake up a friend who usually hosts a server.
I suggest doing this only with friends you can trust!