He is sponsored, you don't make enough money from You Tube ads alone to buy the kit he does, I sub to enough channels to know that, and recently it was exposed how games developers pay large sums to You Tube channels to influence their reviews of the games, and that included that Boogie2988 aka Francis guy who apparently thinks simply claiming he has been paid tons by Microsoft lets him off the hook
You should get some common sense mate, Marques is getting paid a lot of money. I even sub to one person who has 80k subs, not the 1.4 million Marques does, but she was sent to the last Olympics and then CES all paid for by Sony, complete with tons of Sony gadgets! Just so they would promote them and give their kit glorious reviews.
So yeah, trust me manufactures pay these channel makers a LOT of money to have their products promoted, the more subs and views they have the more corrupt and biased they most likely are.