From an affiliate perspective:
I would never ask such a question, but the best line I was ever given by an affiliate manager was "many of our top affiliates make six figure incomes off our program alone".
He didn't specify how many, what time frame or if it was low, middle or high. I can understand the curiosity, but it would be a violation of the affiliate's privacy to divulge specific numbers.
One sponsor I promote actually lists exact dollar amounts for the top 30 or so affiliates. The numbers, to me, are disappointing at best.
My unsolicited
