We are not sure yet, maybe Mbappe is just doing that to make his team spend more for him and increase his salary. Right now are see much news about PSG wanting to increase the salary of Mbappe and keep him in the team for the next season. That's why they did it the last time and it's not surprising to see the same story.
And this might be another strategy for Mabappe just as you have said to make them increase his pay, since he's an asset to the club, I remembered when Real Madrid was interested in him, he eventually disappointed them, and Madrid would have improved his career but since the young man his only interested in money and since he knows the weakness of the club he his trying to take advantage of them to make more money since the boy his good he also wants to take advantage of his age since he his very young and if he keeps disappointing, clubs just to take advantage of his club that's very bad on his reputation, am getting tired of this Mbappe habit, he still wants to enjoy the benefits of PSG and feels insecure if he leaves were will he starts from let us see weather he will stay or not.
and it might be possible
Mbappe's salary has been increasing a lot. PSG's new contract may also increase it tho. The problem is mbappe doesn't wanna stay in the club. The money from al hilal was very big at this moment. Mbappe's ego makes everything become very complicated at this moment. The story in the past will not happen again right now. We shall wait for what's gonna be the result of the deal between mbappe and al hilal. Mbappe wants a lot of money and al hilal will give it. The choice was on mbappe's hand.
I would call him as dumbest player if he will be rejecting hilal's offer. The same offer will not come for twice. Mbappe must try to take the deicision regarding his future as soon as possible. It has been rumored if barcelona is making intervention in this transfer.
I would have loved for him to go to a better club to build up his career, the aspect of having an ego is true, he has earned himself some respect, and his insecurity of not getting privilege in other clubs is what the young man is scared about. look at what we are talking about the young man is concerned about money, rather than building his career. the ball is in his court whatever he wants to do he should do. the story of Mbappe is becoming funnier and how his state of dilemma is actually selfish. forgetting that a great name can actually earn him some good money, look at the story of Messi and Ronaldo they made a good name and now they don't even perform very well but are making good money out of their names, he should think well before making any decision.