888okx - legit platform or red flags?

Hi everyone, I came across 888okx and someone shared a referral link with me. Before I consider anything, I wanted to ask if anyone here knows about this platform? I'm trying to do my research first - does anyone know if this is legitimate or if there are any red flags I should be aware of? I've heard about pyramid/Ponzi schemes. Any insights or experiences would be really helpful. Thanks!