Isn't it obvious the reason is for their own benefit by taking advantage of the naivety of the beginners.
They of course know that this coin burning strategy is still quite effective because there will be many beginners who are tempted by it which makes it like giving rat poison to a pizza to give to rats who are always greedy when they see food.
Beginners certainly won't think much deeper when they find out about the lure of coin burning and for that reason they are sure to fall into their trap.