Three posts upper relationship is explained. AFAIK Maple was not hacked, they just got out of funds, release balances to devs and closed.
"Due to a bug, some people have managed to withdraw all the funds from our exchange. We are in the process of a thorough investigation for this. We are extremely sorry that it has to come to end like this. Until the investigation is over, we cannot refund anything.
MapleChange (@MapleChangeEx) October 28, 2018"
Hacked or exit scam or just closed you don't have any rights to abuse customer data.
And I know remaining funds of many coins have NOT been transfered to the developers!
And for sure the developers are not the owners of the coins ppl have deposited at an exchange.