Poloniex says hacker’s identity is confirmed, offers last bounty at $10M

A community member questioned why Poloniex needed to send an on-chain message in 15 different languages if the hacker’s identity was truly confirmed.
Source: Poloniex says hacker’s identity is confirmed, offers last bounty at $10M (https://cointelegraph.com/news/poloniex-hacker-identity-confirmed-10-million-bounty)
Would appreciate your opinion about this