One of my cousin friend is 15th prestige already,He boosted his way until he got banned like 1 week after his 15th, its kinda funny how that guy wasted his time boosting and getting his account banned.
I don't know but I have seen and reported over 30 people on 15th prestige and YES I do check time played if its under 5 days I report if its over I don't really care its not worth trying at that point.