Please don't share this document outside of STM, this is internal data from the private research company I work at. Had to push quite a bit to get the team to allow me to release this on the forum.
This will come in handy when scaling your winning campaigns. Split testing against different types of people is an easy way to boost ROI - weed out the non-performers and provide more juice to interests showing a higher ROI. Facebook makes it impossible to see all the targeting options available for performance marketers, their interface is a pain to use, so we analyzed every ad interest on facebook and sorted the top ones by audience size.
Data dump in this excel file - 73KB.
We collected this data to study how we can increase ad coverage for the private fb spying tool we operate. We are also working on gathering pricing data for every interest so our clients can see the most and least competitive interests~ I may be able to release a segment of that when we are done processing the data (on 50k+ ad interests).
Enjoy.
Its hard to expect to keep this document inside this forum only when there are a bunch of strangers around here. Thank you very much anyway.
OMG Bob!
This is the kind of information people would gladly pay good money for! And now it's available on STM for free.
Thank you so much for all the value you've been contributing to our community. And please relay our gratitude to your company as well for this most generous gift.
Amy
thanks for the share bobliu! i will not share it 
Thank you Bobliu. Interesting resource!
Thanks for sharing!
This is awesome. Thank you
Thanks mate!
Awesome. Thanks a lot bobliu.
Thank you very much
Thanks for the share!
Good share.
Thanks for the information.