You don't have to have the largest multiplier to win, you just have to be the most recent.
Seems you bring unique terms of contest at this time and somehow I feel this is unfair for someone that hit the highest multiplier in the early days

Yeah I know this competition isn't about who has the highest multiplier but the most recent that hit the required multiplier (50x or more), I think most people will prefer to join this competition in the last days of it although as you said before there is no guarantee to hit it.
most recent who win over 50x multiplier ? but 50x is already a high multiplier if i were to ask but its possible to hit it early as long as bad luck wont screw you .
its unfair to some that hit it right before they released a contest like this but what can they do if the site was late to think of a contest like this ? they can still have a chance to participate and its not too late yet .