Exchange-Specific Restrictions

MoPub:

1. Branded, non-deceptive campaigns only.
2. More details here: http://www.mopub.com/legal/demand-side-policy/ 

SpotX: 

1. Video inventory only.

Smaato:

1. Very conservative; no provocative offers/imagery.  
2. Prohibits alcohol & real-money gambling ads. 
3. More details here: https://www.smaato.com/content-guidelines/ 

Nexage:

1. More details here: http://advertising.aol.com/advertising-policies/advertising-categories/advertising-categories

OpenX:

1. Prohibits real-money gambling ads.
2. More details here: http://openx.com/legal/ad-exchange-demand-policies/ 

PulsePoint: 

1. Prohibits real-money gambling ads.

Rubicon: 

1. More details here: http://rubiconproject.com/terms-conditions/rubicon-project-ad-quality-guidelines/ 

For more information, check out the Campaign & Creative Guidelines.