Umm, exactly. That thread I linked has extensive discussion about it.
In a nutshell, there is no way in hell to produce a thermal camera in the same ballpark as their target specs while staying remotely close to their stated price point. The cost of the optics alone is enough to ensure that even the most modest design will still need to sell for over $500/unit to break even.
I was an early backer of the Mu Optics project on IGG, but asked for a refund not too long after funding ended. It was clear that they could not possibly succeed and were in WAY over their heads. Even now - three months past the supposed delivery date - they don't even have a partially functional prototype. Thermal imaging is not a novice-friendly technology.