Hello Aternos Team,
Today Im here for requesting or suggesting a plugin
I wanted this plugin for my server.
But I can promise that I wont abuse this plugin
The servers has unlimited player slots and Why don't you guys tried to add it.
Here's the plugin link: https://dev.bukkit.org/projects/fakeplayers
Thanks Aternos team and thanks for this best hosting server 
PS: If you guys denied this please tell me the reason why.
Thank you
-Sincerely Meanly