People who won millions are just the lucky ones, Ive done the 50k bet 30+ times in a row and lost all of them, so yep given up on Bingo. Stick to poker is the best advice you should give to anyone.
I have recorded almost 700 games of 100k bingo and in average it's more profitable than poker, even without super bingo (around 25k profit per game). If you add super bingo, it becomes way more profitable.
I've started with a 70 games losing streak when I decided to keep track of all my games and I'm still in profit now.
P.S. There was a guy who made simulations of bingo (don't know how he did it and how reliable it is compared to the real minigame) and he said that in the long run it is profitable.