For me personally I found his attitude towards the entire thing the real problem. He asked if crediting the original creators was enough, he then hid behind all manner of silly startup buzzwords ("a/b testing", "ghetto test", "lean startup") and didn't seem to understand it was wrong. His tweets after the fact were worrying too, especially when others uncovered that they had other products that took designs from elsewhere.
Shit happens and hopefully this doesn't damage curebits business long term, but Allan really needs to understand what he did wrong, he seems to think the problem was he didn't credit and it's perfectly okay to take someone elses work, pass it off as your own and then hide behind silly phrases. No matter what your business is or how old you are stealing is wrong.