Of course 50 risked BTC amount is not real but if you look at the 2013's post
https://bitcointalk.org/index.php?topic=211858.msg2221664#msg2221664 :
"If you want to make a rating stronger, increase "Risked BTC". 50 extra risked BTC is equivalent to an additional rating."
I followed the rules and put 50 risked BTC to give a stronger rating. Other risked BTC amounts are 100% real!
I don't think that's valid anymore. The current system scores all ratings equally but the fake amount stands out to other users looking at it.