Firstly, to address my main gripe with Million Dollar Secret, I personally think a million dollars is an obscene amount of money to offer as a prize for winning a gameshow that lasts only 8 episodes. If it was just $100K it wouldn't make any difference to the watchability of it and that's still a life-changing sum of money. The issue with stupendous prize money is that you really want someone deserving and likeable to win it, but reality show contestants are very often the opposite, especially after they've been forced to lie and deceive in acts of sheer selfishness in order to win. It hardly endears them to the viewer.
Anyway, with that out of the way I do like the concept. 12 players have a box, but only one contains the cash. At the end of each episode there is a Traitors-esque banishment in which the players try to eliminate the current 'millionaire' in order to randomly shift the cash to another persons box (preferably their own!).
Along the way there are games and challenges with a chance of rewards and secrets for those who win, to help them either follow the money or hang on to it.
On the whole I'm enjoying it, it's entertaining and it fills a gap until the next season of The Traitors!