"An analysis of the BTC wallet promoted by many of the hacked Twitter profiles shows that on July 15 the account processed 383 transactions and received almost 13 bitcoin on July 15 — or approximately USD $117,000."...
Not a bad return for their attack:
More than what their bug bounty would have paid for it.
And...assuming it was social engineering and/or an inside job, both those two things are generally out of scope for bug bounties anyhow.
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