Related to fingerprinting, it's theorized that if a person doesn't have a Facebook account but their friend group does, Facebook will create a "shadow account" which isn't public but still attempts to collect data for this person based on the posts, pictures, and location data from friends on Facebook that spend time with this person. Zuckerberg admitted to Congress that Facebook does collect information on non-users.
Even for users, Facebook attempts to establish a lot of metrics, even if the user doesn't provide them, like estimated income and political affiliation, for advertisers to use.
I saw some of this first hand. Several years ago I tried some advertising for some affiliate marketing. Facebook's ad platform let me limit advertising to people with gaming consoles between certain ages, and I noticed I could target it for people who likely leaned more liberal or conservative if I wanted, or only for an estimated household income level. It's surprisingly detailed.
A decade ago I had a little extra money and chose to buy a 144 hz gaming monitor and video card. I don't have great eyesight nor do I play games that require twitch reflexes, but at that time 144 hz frame rate (and configuring the game to be >100 fps) was very noticable. I'd much rather play 1080 at >100 fps rather than 4k at 60 fps or below.
This may be different between people. I don't believe I have great eyesight, depth perception, color perception, etc, but I am really sensitive to motion. I built my second computer (AMD Athlon 64 bit I think?) and spend a significant sum on a CRT that had higher refresh rates. I can't use a CRT at 60Hz. I perceive the flicker and I get a headache after about 20 minutes. I couldn't use Linux on that computer (I was stuck at 60 hz on that kernel/video driver) until I saved up even more to buy an LCD monitor. I can't perceive a 60 hz flicker on an LCD, and 60Hz is fine for work.
But for gaming, high refresh rate is noticable, even for someone that normally doesn't notice visual stuff, like me.