We are talking about pre/post monthly bonus here, I'm curious about your friend's account rank and how much he wagered that made him received nearly $100 on pre/post monthly bonus. As long as I know post monthly bonus is mostly based on VIP level only (fixed amount) but of course there is also requirement to receive the base fixed amount for the pre/post monthly bonus. I have never heard someone received nearly $100 for pre/post monthly bonus, at least no one who shared something like that in this thread. I know some friends who are between Platinum 4-6, their pre/post monthly bonus is no more than $50. Seems that you are talking about monthly bonus instead of pre/post monthly bonus.
Receiving monthly bonus in stake gambling site is depend on account level for VIP member easily to earn large amount bonuses not only monthly but also weekly, but if VIP member level account less amount wager every month will receive bonuses for monthly or weekly? I see easily with stake user when their account have been VIP member or platinum to received more than $200 to $300 monthly bonuses by claiming every day,
however its best appreciated when any casino platform reward for their loyal user have reach higher and most important level. Just current cases with stake not easily suspend some account when success pushing up until raise gold, vip or platinum level because they have spent much money to raise higher level.