I think Monaco could be a big flop if they don't come out with a VISA partnership soon. Their whitepaper never sounded good to me but the idea behind Monaco (to exchange coins at a FAVORABLE rate for the user) is very very good. If someone implements it, they're gonna make a lot of money.
None of them have visa on their cards I think. I don't think they will very soon.
But the first one will have a major price increase