Question about adding Jars

Question about Minecraft Instances. Will more minecraft spawns ever be added directly to AMP to make them download faster?
E.g. Mohist?

You can use the Custom server type for that.
All you need for the Custom startup command setting is:
-Xmx{Memory}M -jar {JarFile}

(don’t edit the stuff in {}, just copy/paste that into the setting)