those guy are making nothing, yet they are rich as fuck, i've heard they have plenty of million already, because for every 2M you have an estimate $5k, multiply for all their trash video
pewdiepie make a "stupid review" but some people need it, sometimes we need entertainment
because we do not always have to be serious
But many people try to make a "stupid review" and rarely successful.
So I think make a "stupid review" on youtube and get a lot money from that its very hard.
Well you just have to have a good number of audience,
Record whatever you want about a game or app or goods review,
And you will reach millions, it's all about if it goes viral, millions of subscribers etc.