If I remember correctly, AIA's delisting wasn't due to market manipulation, but rather a dispute between the two founders. The founder controlling the contract feared the founder controlling the spot market would cause trouble, so they switched token contracts and delisted the token. One of them held a large proportion of the spot market that they couldn't sell, while the other was holding the profits from market making through the contract but wasn't sharing them, leading to the bizarre situation of the contract being delisted and then relisted several months later…