my best days would be around 20 a day
but just like Gio above, I know some clients that make CRAZY money and it's from affiliate marketing as well, but with those programs you have to ask how much they spend as well. Most of the affiliate marketers use CPC to build traffic to their products.
You said it Brandon. I also know quite a few that spend a crazy amount marketing themselves. It takes a lot to get to where some of these people are. In the end, it all comes down to a strong team.
Most major websites that I've worked with have a series of developers (all for different purposes), a webmaster, a marketing guy, a project manager, an investor, a set of brains, and sometimes even a couple thousand hamsters running their wheels.
Then again I have this one guy, who as far as I know (other than a site he did with his brother) comes up with all of the ideas himself and just has me work on development. But his dedication alone overpowers that of most teams. He's the type that's easily inspired, continuously motivated, and always hard working and optimistic. Easier said than done huh?