I confirm that I have received the correct Betcoin email and user ID. However, this information likely would have been in one of the supposed earlier breaches (I don't remember the exact details at the moment) and I have shared both details publicly. I've replied to their PM asking for info that could only have been obtained a few months ago.

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Update: I have also received my PlayBetr email (never shared before anywhere and is unique specifically to PlayBetr) and exact balances of my accounts from February 16 (Betcoin) and February 6 (PlayBetr) of this year. PlayBetr is 100% accurate, and while I don't have perfect memory of my Betcoin balances, they seem 100% correct.