because it depends on the person himself, if he is up to collecting affiliates or not. because if you are an introvert person, you won't waste your time looking for others to be your affiliate. you are just happy playing on your own.
I think you may have misconception about the subject of affiliates and how it works because playing on your own doesn't have anything to do with your affiliate program if you subceibeyto any of them and as a matter of fact affiliate program is all about the earning and not the games you enjoy playing.
So the income is calculated based on a number of wagering that is done by both the affiliate and the referee.
maybe, you didn't get my point here. what i'm trying to convey here is that some people don't have people's skills where they can't get some people to be his affiliates, and so, he is just happy to play on his own account. not bothered if he has affiliates or not. of course, if you can get your affiliates, definitely, the chance of earning is always there, depending on the gambling activity of such affiliate.
by the way, what do you mean by this "subceibeyto?"