In all the excitement, few people ever wondered what became of the ndiki taken to Northammon Scout Base. If they made a guess, they'd probably assume they were returned to Perez.
Wrong.
They were actually shipped out of the sector in absolute secrecy to an Imperial Research Station in the Spinward Marches. The tests showed that the ndiki's remarkable intra-group cooperation was due to a low-level telepathic link. Furthermore, the intensely clear and accurate nature of the hallucinations experienced by users of Reve 3 indicated a psionic element – and the rare "bad trips" when a user seemed to experience someone else's fantasy may have been exactly that.
In other words, Reve 3 was both a natural psi-enhancing drug, and perhaps even a catalyst of previously-unrecognised telepathic abilities. It is therefore possible that the Imperium has continued to produce and study Reve 3 in secret, despite the horrendous legal and moral implications...