The dev is from Europe..
Now it's like 4AM. You expect people to be online at 4AM? Just wait until morning and see what happens then.
If it's a "scam" then screw it.
That's hardly excuse to be honest. It's first night of his "business" launch and I couldn't give less care if he's bit sleepy at Saturday night. He's not around since before Midnight and barely posted since the launch.
But yeah, he can still make it right, though with much more professionalism than so far.