Those who own the controllers get most of the yield. They are making a ton of xpy on top of what they already have. There's no need for them to buy more when they make more and more.
Those conned investors and brainwashed probably do most of the buying
This is a possibility but ask yourself, would you rather be dumping millions of XPY at 5 cents [which is where XPY will be soon if this is indeed a scam] or would you rather have a viable plan and sell at a much higher price?
Good thing about XPY is things are moving fast so we'll know in 30-60 days.