he come on guys it is not only about putting ads and that`s it. I am no fan of MFA. It is also our responsebility as webmasters to provide the world something useful.
500, 5,000 or 50,000 words; it doesn't matter. You might use 100 or less, but make sure to write something with content. I think that's the best way to get targeted ads and of course to make more cash.