Here's another popular way to monetize your blog. I believe they are more lenient that google adsense.
http://www.bidvertiser.com/

They probably are more lenient and offer lower payout of $10, compared to Adsense...

However, you only earn from clicks. So end of the day, it still depends on how much traffic to your website and how many people are clicking their ad...

For me, Adsense is better because it allows me to earn from impression as well as clicks. Even if there are only visitors but no clicks for the day, I still earn a little.

And using both Adsense and Bidvertiser for more than a month, I find Adsense gives me higher earnings while Bidvertiser is zero.....Therefore, I don't use Bidvertiser anymore....that's from my experience though

I use bidvertiser at some of my websites, and works just fine.

It all depends on the traffic your site gets.

Regards...