The fact that this happened on a Friday with a Monday holiday coming up smells extremely fishy to me.
Of course this is completely unfounded, but I have a gut feeling its a hack and we will be hearing more about it in the future. Most electronic heists happen at exactly these times because the banks will not reopen until following Tuesday at which time it can potentially be way too late.
One prominent example that I can think off the top of my head is the Bangladesh Bank Robbery [1], but I am sure there are more example to be found
>National Bank said the first breach began Saturday, May 28, 2016 and continued through the following Monday. Normally, the bank would be open on a Monday, but that particular Monday was Memorial Day, a federal holiday in the United States. The hackers used hundreds of ATMs across North America to dispense funds from customer accounts. All told, the perpetrators stole more than $569,000 in that incident.
An interesting data point is that Etsy made charges to cards, but then offered refunds to the bank account on file.
This tells me their merchant processing credentials may have been stolen, and since they didn't initiate the debit, they don't have the transaction IDs immediately available to refund/reverse them. (Obviously the processor would be able to provide these on Tuesday when they open back up)
Of course this is completely unfounded, but I have a gut feeling its a hack and we will be hearing more about it in the future. Most electronic heists happen at exactly these times because the banks will not reopen until following Tuesday at which time it can potentially be way too late.
One prominent example that I can think off the top of my head is the Bangladesh Bank Robbery [1], but I am sure there are more example to be found
[1] https://en.wikipedia.org/wiki/Bangladesh_Bank_robbery