I think calling the behavior fake 100% is a bit too much. They may be using money not really from them, but the games they are playing are still being played by them. They are still, technically, the ones experiencing the wins and losses in that match. It's like saying someone has no reaction to dropping the mmr of a friend's account since it's his friend's account and not his, right? There may be a difference between losing your money and losing others, but it wouldn't be 100% fake, there would still be some disappointment that stemmed from yourself in there.
because from the very beginning their goal is not to gamble but to work, because it is like gambling but it really isn't.
they only do promotional work on behalf of themselves even though it has been set in such a way to make it look like real.
but this is just a job they do for profit and for those who watch shows like this and believe that it is genuine it is their aim to get traction so that the place or site they promote can run well so that they too can be well paid .
regardless of their reaction or fun and MMR they don't care about it all they care about is work, promotion in gambling, getting paid and done nothing more.