Most affiliate links and sponsored posts from reputable merchants are allowed on WordPress.com, as long as your blog’s primary purpose is to create original content, and not merely to send traffic to these sites.
Advertisements, including those from third-party advertising networks like Google AdSense, OpenX, Lijit, BuySellAds, and Vibrant Media are not allowed on WordPress.com.
If you would like to run these types of ads on your blog, consider the following options:
- We have a feature called WordAds that lets WordPress.com bloggers with moderate to high traffic and appropriate content turn on ads and earn money from their blogs.
- You can run any ads you’d like if you manage your own WordPress installation. More info, including hosting recommendations, can be found at get.wp.com.
- WordPress.com VIP sites are permitted to run ads.
In addition to AdSense-type ads, please do not use promotions of the “I made a million on the internet and so can you” type of advertising, multi-level marketing, gambling, or pornography.
If you are in any doubt, please contact support for clarification.