I've been assuming it was some sort of profit motive as TX has been pumping money into it. It seems like there might actually be science driven though. For tramatic brain injury combined with ptsd ibogaine causes a release of glial cell factors that help neuroplasticity wire around the damage. Its also horribly unsafe from a cardiac perspective so you would need a constant eeg during therapy driving up prices. So probably a little of the original motivation too.
Not really "horribly unsafe", it seems that with proper prescreening and magnesium supplementation cardiac risk can be safely managed. I was looking into this a few weeks ago.
However there is certainly a lack of data, and facilities doing treatment now are probably incentivized not to share adverse events.