It was made clear in the original post on this thread.
You can also see how to take part in the buyback here
https://betking.io/blog/first-bkb-buy-back-date/All ICO info can be found here
https://betking.io/ico/There really is nothing in all this thread that has not been answered before the ICO even started which is why I don't check this much. I also still don't get notifications of replies here for some reason.
Why don't you tell people that Americans aren't allowed to participate in the buybacks because the site won't allow them to deposit BKB? Why wasn't this disclosed during ICO?
It's really unfortunate, there's no other way to sell them, not enough demand on Etherdelta to sell any. No PR and no visibility for the token will ensure that it stays this way.