They can, but they'd need to run their own repository. F-Droid makes it easy to add other repos. https://f-droid.org/tutorials/create-repo/ https://f-droid.or

They can, but they'd need to run their own repository. F-Droid makes it easy to add other repos. https://f-droid.org/tutorials/create-repo/ https://f-droid.org/tutorials/create-repo/ https://f-droid.org/tutorials/add-repo/ https://f-droid.org/tutorials/add-repo/