10k/month is not hard to believe. I would guess there are quite a few folks lurking that clear at least that much. Most of us don't care to divulge too many details unfortunately. I will share this. It is possible to do with one site. I spent 8 years building my site up. If you are passionate about something, you can do almost anything.
Now its 35 percent for about 1000 or more. I find it hard to believe its that high in real life. Perhaps its that high on this poll because people who tend to look in this folder and have a registered account are experienced webmasters.
Currently my top out was around $900.00, although by December I'm looking at racking in about $10,000.00
I made last month around $1200, this month looks like it will be the same, I hope.I am a part time webmaster, to put it this way. And for the person who asked how do you have time to post here, well, exactly because i post here I learn a lot of things, really.
as a webmaster my sites, affiliates etc only $100 a month if lucky as a domains I earn 4k and upwards most months
Now its up to 38% for 1000 or more. No way is this poll accurate to reflect the average webmaster. I bet most webmasters just do it as a hobby and make a few bucks a month.
As I have said, exactly because I am here I learn a lot. Don't underestimate the power of a professional community.