How can someone buy BCH and think that he is buying BTC is beyond me, considering the huge difference in price. I mean, if you buy BCH thinking that you are actually buying BTC, but discounted for 97% (and not questioning yourself how can that be possible) you will have hard time in crypto. Hell, even on that website they make distinction between those two.
They deposit fiat and buy bitcoin. If they can differentiate this, I think they would not be scammed. The problem is most people looking fot buying bitcoin to pay something go to bitcoin.com (as we have a tendency that dotcom is the authentic site) and buy so called bitcoin without knowing that they are BCH actually. And you can find a lot of threads where newbies complain that they buy Bitcoin on bitcoin.com and sent to their address but not received. Because they bought BCH and send them to BTC wallet. I think bitcoin.com is liable for all this.