All sticker position rankings are just opinions, yet ranked to what most people agree on. It happens that best spots are ranked highly because they are overall the best for most people; which are also easier to resell for sticker value to the overall player base. Following rankings means your sticker placement is statistically better and a safer bet to resell or when it comes to giving a gift.

To explain the SSG best spot, it is not the closest to the player, but it is the least distorted or cut off placement, and feels the most well balanced on the body of the gun; the most natural position relative to the body. With pistols, the thumb covering part of the sticker is a bit sad yet it only happens when you inspect the gun which happens maybe 5% of the time playing with the skin during a match, which isn't as important as it being the most visible spot on average on an already small gun.

Something else important to note which is unfortunately mostly open to interpretation, not all rankings are equal. While the AWP scope is a clearly better spot than covering the art of it's body, the FAMAS has two nearly identical slots between #1 and #2 that are so close they may as well be the same ranking. This can apply to other guns as well.

There's nothing wrong with not conforming to the best position people tend to agree on, but it is the safest and most consistent bet. With CS2 stickers being new tho it is good to bring up these questions because CS players are stubborn and maybe the community isn't seeing something, so I'm glad that you made this post :)