hi
as a facebook marketer I can offer the following
I am able to extract all user uid,s from facebook groups in your niche/product ,then make a catchy ad
and sent that to all user uid,s witch are already interested in your niche/product so your ad will reach highly targeted people who are already interested in your product witch is a money saver instead running your ad to millions of people who have heard about your niche/product but do not follow uif interested let me know
regards dirk