Quoted from Kabball:Sounds like one of you may have actually answered me though, a super fan got banned and took out all his positive reviews? lol if that is true it is kind of what I was expecting happened.
Levi wasn't being serious. Each member can only submit one rating per game.
I don't know why the rating suddenly jumped up to #1, then dove back down to #50. But, that phenomenon sometimes happens with a new game release and a bunch of people all review it. Or, when a bunch of people see it at a large event and review it. And based on what's happening on the reviews page, it is highly contested with fans of the game offering their input, and people who aren't fans of the game offering theirs.
https://pinside.com/pinball/machine/pinball-brothers-alien-limited/ratings
All the way at the bottom of the ratings page, there is a history chart for the game's rankings.
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In any case, it seems that it was some sort of fluke that it temporarily jumped up to #1.