this is a good marketing strategy to attract new customers,
but for me the most important thing is security, with strong security system i believe customers will come to okex with or without loyalty program rewards
before they launched loyalty program , Okex already thinking about their security level especially about fund that will cover user fund if Okex hacked like previous case in other exch. they have several fund allocation to attract new customer that use their services, maybe in loyalty program or maybe in another feature such as trading margin feature or even security.