I would say a million a month is very rare and you have to estimate the amount of traffic or players needed to get there and it’s hard to wrap your mind around.
I won’t confirm or deny but I will say back in the day VIPprofits.com used to post their top 10 affiliates in a given month. I can’t remember what those numbers used to be but I thought the top 3 combined were close to $400,000 in income. Keep in mind if this affiliate is making $125k that this is only one of their programs and nobody knows if they are their top program of just an average.
Overall I think 100k/month is possible but you have to be very ambitious to get to that stage and it’s not going to happen overnight, at least a few years. Everyone says they want the money but you have to love doing the job to begin with otherwise you won’t be the person doing 12-16 hour days all the time and will lose out to the person that does.