Oh i know that everything we all built back during the plugin phase was being harvested. Hell I chatted with the guy who built the first PDF Assistant plugin on the store. He made a nice chunk of change on it too.
Yeah plugins in general weren’t, but mine was 
I had a DB layer, 3rd party user management, and the github api. So basically you would sign up for my plugin and you’d get cloud storage associated with your user id. You could create projects and have custom instructions that were appended to your prompts (before chatgpt had those too), save project notes etc.
It meant you could have memory across multiple chats back in 2023 lol. Combine that with access to pull trees and files to Github, and push commits directly from ChatGPT and it was the first Conversational IDE. Basically what Replit’s Agent is now. I actually built and hosted it on Replit before that blew up to what it is now.