We are in no way claiming this text to be our own.
There is nothing to say we are not. I am referring specifically to this as a website issue, not as a general copyright one. Copypasta from another website, in its entirety is known to effect search rank, among other things.
Copying text from a box is a different matter. We clearly indicate that this is text from a box. When it is a digital game, we do not indicate this is text from another website, nor what that website is. It is allowed for a website to take in whole a block of text from another website if it is cited as such. So a digital game would not say "box text" it would say "game description from steampowered.com" or whatever.
Digital games also have a problem where their descriptions can change over time, or be removed entirely. The text on a box can never change. I don't think we need to try to keep the digital game entries up to date with the correct description that is on another website. Instead perhaps in the future, box text can not even be an entry field for a digital game, and instead you can put a link to the store that game is located at instead.
Maybe some other ideas can be put here, aside the plagiarism thing, I think it is the wrong word in the style guide, but it means to take the content from another website, and you are right, there is not a way for us to pretend someone here actually typed it themselves. Unfortunately, the internet doesn't work that way, it is implied that all websites own the content they create unless specified otherwise. You see this all the time when a website gets in trouble.
So we need to determine if we are allowed to use description from another website for a digital game (the plagiarism thing) and if we are supposed to be using Box text field at all (the rule conflict).