It is on this forum that i get most of the casino that i gamble in, it is easier for me to go through their ANN thread, check their site out and ask questions (if any), directly to their representative on the forum.
1) Do you care whether the influencer is playing with their own money? ("fake balance" x "real balance")
For people who like to get new casinos from these streamers, then this would matter to them, but only if the streamer is going to show deposits and withdrawal, and for that they need to do it with their real balance and definitely not a fake one.
3) Is the amount of money the infulencer plays with important to you? ($500 x $50k)
It should not IMO, because whatsoever the streamer does should not be enough reason for you to trust the casino immediately. You should also DYOR about the casino and check if their are previous complaints against the casino.