You really should close this thread, it's nonsense and detracts from any point you may have. Dean had a winnable jackpot, no one won it and he removed it. That's not scammy, that's business as usual.
That said, betking.io is probably on it's last legs. The homepage now defaults to an exchange where there are unfilled sell orders for betking's token at 50% of their face-value. If that's not a red-flag that spells trouble, I don't know what is.
Regarding betking being on its last legs, I certainly hope it is. He raised $6.5 million to develop the website but re-launched the very same one that he closed in 2016 just to re-open it months later. He broke almost every promise in the whitepaper. The token "profit" distribution was also a disaster.
It was reported Dean Nolan tried to sell betking several times in 2016 but was unsuccessful so he had the idea of the ICO. The Reddit post from chazley explains a lot:
https://www.reddit.com/r/Bitcoin/comments/5gfdxk/betking_trying_to_censor_questions_about_ico/About the 50 BTC jackpot, nobody won it because Dean Nolan did not allow enough time for people to win it. Dean Nolan used the publicity to bring in new customers but removed the 50 BTC jackpot without any notification or announcement. Technically he can do it but ethically he is scammer for doing it.