Need more info about Pling appimage update

Hello. I just discovered Pling and im not a developer.
I thought the way it was working here on Pling, was example: github repo was added and then the users would pull the latest appimage available from the github repo with ‘app install’. But thats not whats happening here. I just tested with session-messenger-desktop and I got the 1.0.2 version while on the developer github latest version is 1.0.7 thats literaly 5 version behind. And that appimage has been added by a guy(hb882) that has uploaded over 500+ ‘products’ in Pling. Hows this suppose to be good?