I have my project on Github and have some plugins that I bought from the marketplace. Its not letting people who havent downloaded the plugin open the project. I know theres a way around this, but how???
You can deactivate/remove the plugins in your uproject files so that Unreal will not look for them.
But then you will get warning/errors if some blueprints were referring to blueprints or content from those plugins.
In the end if your team members need to work on assets that refers to those plugins they will need to get the plugins too.