(It might also be worth providing instructions in your post above for how people can update their apt / yum configs to remove Cloudsmith, so that people stop getting this 402 error every time they do sudo apt update?)

Please provide an alternative way to install and update the package as this software is really awesome and would highly recommend it.

Note that you can always get a .deb and .rpm package in the release section of the GitHub repository.

i.e. https://github.com/balena-io/etcher/releases for those people not familiar with GitHub.

Nope ! in my Ubuntu Focal 20.04 I have package balena-etcher-electron installed. It's no where here in the releases ...
How to you build this package then ?

I have for the moment edited the lines in /etc/apt/sources.list.d/

$ sudo mv balena-etcher.list balena-etcher.list.bak
$ sudo mv balena-etcher.list.save balena-etcher.list.save.bak

In order not to block updating from all other repos ...

Well installing balena-etcher 1.18.8 (since the package changed name ...) ended up with an error ...

Unpacking balena-etcher (1.18.8) ...
Setting up balena-etcher (1.18.8) ...
Error in file "/usr/share/applications/org.kde.kdeconnect_open.desktop": "/" is an invalid MIME type ("*" is an unregistered media type)
[...]

Although the package still gets installed and seems to work opening up its windows.

Hey,
Feel free to use my personal repo headup-public-repos, at the moment, I'll only have rpm, but I'll see if I add others as well.

Cheers.

We're moving out of Cloudsmith...

Does that mean that the "OSS hosting by cloudsmith" button ought to be removed from https://etcher.balena.io/#download-etcher ?