It looks like a lot of kids ended up in the wrong forum. This is a Q&A site for the developer community on the apple platform, not for user feedback of third-party app developers. These complaints will not get you anywhere. You have to contact the publisher of the game.

I would like to point out that Xcode 11.5 beta 3 ships with a template for file provider extensions on macOS. As described in my own question, - https://developer.apple.com/forums/thread/675686 I did not succeed yet in getting it running, though.

Quoting a bit from man pluginkit: + indicates that the user has elected to use the plug-in - indicates that the user has elected to ignore the plug-in ! indicates that the user has elected to use the plug-in for debugger use = indicates that the plug-in is superseded by another plug-in ? unknown user election state