Already got two angry clients asking wtf is going on
It’s surely done on purpose, they do this very often http://newsfeed.time.com/2013/12/12/33-time-magazine-covers-that-appeared-to-give-people-horns/
... and also make margins consistent.
@revaxarts, I didn’t say that private repositories aren’t allowed – they are. I was asking just just about public reps.
This copy-pasting of purchase code to register on support forums is ridiculous and confusing for many buyers, especially at first time.
Please create OAuth login system, so we can register the buyers on our support forums and check if they purchased an item in one click.
So I finally got an answer from Envato support, turns out that you can’t host the code in public GitHub repository no matter if you choose 100% GPL or not, as it violates Exclusive Author agreement. Pitty.