Are you entering?
The major problems with this type of exchange promotions is that KYC is involved and such personal data should be highly protected at this level of technology.
I will join if there is no KYC documents required.
It's a contest for marketing purposes. The rules don't say you have to be a member of the site nor the reward will be paid directly to your Cripto InterCambio account.
So to me, the rewards are paid outside the website. i.e: they will ask you a wallet address. If they then say the opposite they could be sued for not respecting their own terms.
I know it sounds funny but if you check medium and large brands running similar offers they all have clear and strict rules and I can tell you why. Some people spend most of their days hunting similar contests on social network (especially on FB and Insta) to find the loophole and get free money/items. Community managers have headaches with those people.