Tumblr is one of the most popular free Web 2.0 social networking platform. If you can target the right niche, you get lots of traffic from fellow Tumblr members. Traffic is money, somehow you need to think of a way to convert your Tumblr traffic into money. Could that be Amazon affiliate links or Google Adsense ads? That’s all up to you. One word of warning though, if you simply copy contents from fellow members, you use unoriginal content or copyrighted images without permission, or your posts are lack of text material, you will put your Adsense account at risk. Try to think out of the box, figure a way to send your visitors to your money site. Here is a collection of 13 free Pinterest style Tumblr themes. Nowadays people love Pinterest, would a Pinterest grid based style Tumblr theme help in any way?