Fairbrix was flawed from the start , I doubt people invested serious money into it.
Flawed in what way?
Other than the fact it was initially prototyped using multicoin, since the point of multicoin was simply to be able to use the same executable to run any blockchain) In other words, what was wrong with the specifications of its blockchain, that made it too flawed to use the same specifications in the bitcoin based executable that runs just the one blackchain and a testnet for it instead of using a config file to set which blockchain it is to use at runtime?
(Which language or binary one uses to run a blockchain doesn't change whether the blockchain is flawed or not, it is merely an implementation detail).
-MarkM-