For comparison's sake. The last two major US tournaments were the Philadelphia and Chicago Open.
Philadelphia Open: $225 entry fee with $60K guaranteed. The class prizes were $4K to $5K.
Chicago Open: $235 entry fee with $100K guaranteed. The class prizes were $3k to $5K.
So Millionaire Chess will be 5x the fee for 10x more guaranteed. Seems like a good deal, especially if it has a low turnout.
he majority of the prizes are token amounts, $2000, $1000, and $600. These won't pay most peoples expenses.
In every other major US chess tournament, the people who get the low end prizes are lucky to get their entry fee back once you consider all the ties. If you're from out of the area, you almost have to finish clear 1st or 2nd to break even if you're paying for hotel and airfare. If you're playing chess for the money, you have the wrong hobby. I suggested in another thread that poker is a much better RoI than chess and it's not even close.
So all of the arguments about the cost of the tournament for people who don't finish at the top are moot. That's the environment for all chess tournaments here. The biggest difference is that you have a chance to make a bigger return on your entry fee than at almost every other chess tournament. Anyone who plays should hopefully understand that. For the people at the top, there are other considerations, like GM/IM norms.