Clean enough, but you will need to have readers that drill down and are very interested to get the monetization. I always wonder why wordpress templates are not more savvy of the Sweet Spot Triangle (or whatever it is called). That is, once a browser renders a page, the User's eye travels from upper left corner across and then down the right. For example, observe how the search engines such as Google and Yahoo do it. In fact, the top left is a premium sponsored spot. This is because the User may click to your site, then change mind and leave... but, if they see something (hopefully a monetizing ad ;-)) to click on of interest... then you have them! Trick is doing it without spamming the whole page trying to hit something that interests them or turning them off because it is obviously just an advertising page with little or no content. Yeah, you still want content. If for nothing else to get the search engines! LOL! Well, just my two cents worth based on eBooks and such that have cost me much more than that! Good luck!
I like the themes, nice and kinda give some impression of "Green Environment" to me. The post all looks neat, perhaps more content would be better.