Even taking their OWN bot accounts to top 500 is proven with tons of accounts being moved out while registrations were closed because of a phone verification problem.
I hereby request that you stop perpetuating this claim unless you have evidence for it.
You can ask anyone participating in the contest regarding how their ranked dropped down by 200-300 in just 2 days (which is impossible), while there could be no registrations done because of SMS verification problem.
Everyone will say there were fake accounts being moved to top for no reason.