The AUR is essentially a non-curated repository of scripts named PKGBUILD which perform some actions and build a package pacman can install. The expected way to use it is to download the PKGBUILD file to a folder, read it to ensure it is not malicious and run makepkg which will generate a package you can install with pacman.

That being said most people use a helper which does all of that automatically. My recommendation is to install yay or paru using the process I mentioned above to understand it, and from then on use that program to install new stuff. Both of them are drop-in replacements for pacman so you can use them for all package installation.

That’s a solved problem, the answer is Calibre. If you want a nicer interface and some other fluff you can install calibre-web as a frontend for it. Calibre-web is very interesting if you have a Kobo e-reader because you can configure it as your store and get the books you add to calibre to magically appear on the e-reader with a nice download button next to it.

Besides what the other person said, there’s also the whole treating Linux users as second class citizens. If they didn’t had a launcher for Windows, then it wouldn’t be that big of a problem, but the fact that they did created a launcher for Windows years ago and porting it to Linux has been the most upvoted feature request since then and they haven’t done it is a slap in the face of a community that shares a lot of their beliefs. Valve is investing money on making Linux gaming a reality, GoG won’t even port their launcher to Linux, despite not caring for a launcher I know who I’m giving my money.

I use characters from whichever book I’m reading at the time. Examples:

• Arya: From ASOIAF, a small but powerful Ultrabook
• Cthulhu: From HP Lovecraft, a huge 17" laptop
• Horus: From the Horus Heresy books, A powerful laptop
• Binky: Death’s white horse from discworld, a white desktop
• Peaches: A rat that always carries a book with her. My home server

Jellyfin has an app for fire stick, it works flawlessly

That’s like compiling a list of all of the hacks that happen on the internet and jump to the conclusion that the internet is bad because of it.

Some of those are just people falling for old scams/phishing that could have happened anywhere and are not a Cryptocurrency problem. Pyramid schemes are much older than Cryptocurrencies, people falling for it there would fall for it elsewhere.