What are the levels of MDX?

Can you please elaborate on the different levels or tiers of MDX? I'm curious to know if there are distinct categories or classifications within the MDX ecosystem that offer varying degrees of access, privileges, or benefits for users? Are these levels determined by factors such as investment amounts, trading activity, or perhaps by meeting certain criteria set by the platform? Additionally, how do these levels impact the overall user experience and what kind of incentives or rewards do they unlock for those who attain them?