It’s pretty common to use red and green when comparing AMD and NVIDIA. It’s based on the company’s branding. Some refer to them as team red and team green.

Pretty much. While I wouldn’t say that I’m obsessed, I would greatly appreciate it if usage increased. I wish open source software was the norm.

This is very common (compared to the rest of the population) amongst Linux users. Some people therefore feel the need to spread awareness.

I’m assuming the price is lower just to gain some loyal customers. It’s a tried and true strategy. If they were in the same position as Nvidia they would absolutely charge you like Nvidia is doing.