I actually dont understand how we can just post 2-3 posts a day and expect to make even a few cents a day from adsense. I have some autoblogs, a few covering general topics which makes 10 posts and 4-5 videos a day and I get about 70-80 visitors daily and it makes me around 20 cents a day. Not much but I wonder how much traffic you would get if u make only 2-3 posts and how many clicks that would generate..
I just checked TechChuck.com and it has about 19 posts for today, 23rd oct.
This is my logic. The number of posts accumulates every day. At 3 posts per day, that's 21 posts per week. In a month, that's a total of 90 posts. So, technically, the reader/visitor still has a lot of posts to read on any given day.
And now for the kinds of visitors. There are two. New visitors and regular visitors. Frankly, the new visitors have no idea how many new posts you add per day. Since they probably got there from the Google search page, they probably will be hitting an old post on a topic they searched. So, the new visitors will be saturating their senses by clicking one post after another. At this point, put yourself in the shoes of your reader, do you care if the post is very old? Would you be constantly looking at the date of posting? I don't think so. I know I don't.
And now for your regular visitors. We still need to qualify regulars. Is your blog their only source of information? How much time do they have to read your posts? If I have 3 new posts at 500 words per post, that's 1,500 words or roughly two A4 pages of new information. It will probably take me about 5 minutes to read. Anything longer and I'll buy a book or download an ebook.
And now for the ads. My logic is that the ads change every day and this is true even for a single post. So, each day the reader who keeps coming back sees something different. Whether you have 3 new posts per day or more, the number of advertising slots is fixed. So, there's practically no difference.
Of course, this logic fails if you have some kind of news blog where people absolutely need to see new stuff and lots of them. But then again, I don't have much knowledge nor opinion on this highly competitive type of blog with highly perishable content.