How the fuck did that happen anyways? Valve just randomly decided to make a post praising Minecraft for no reason... that's unprecedented. It could have happened espontaneously, but maybe they had a deal? Maybe someone at Mojang knew someone at the tf2 team? I don't know, it is just really weird.
I think it was the result of a large amount of people on the tf2 team playing a ton of minecraft, which resulted in them writing a post about that strangely addicting game in the tf2 blog.
why are they even a thing though, can anyone offer me an adequate psycho-social explanation for a collective of people making money from videos of themselves playing minecraft, a game i don't have the patience to watch myself play
people make money of themselves playing league of legends, and starcraft. basically it works like this: if there is a thing that is popular, people will pay not only for that popular thing itself, but for anything surrounding or related to that popular thing. sometimes the things surrounding that popular thing make more money than the popular thing itself. example: the transformer toys made more money than the actual transformers cartoon
Roughly, there's not nearly the same amount of money in being an internet celebrity as there is in brand product sales, but it gives the person who is in those videos many chances to appear in places via paid gigs or eventually get a job somewhere related to what he or she did in the videos.