This is indefensible, and terrible for Ghost's reputation. Both you and the CEO should be groveling. This was a huge mistake. Please think of the actual engineers, designers, and everyone else who works on this product, who are probably facepalming over this. What a horrible representation of one's work. Hopefully you can still sympathize with them, along with the customer.

(The withholding and potential destruction of data and IP, not the tweeting).