I want a software or a easy method to extract facebook ALL user IDs from any facebook groups. Any groups, even the groups I'm not joined to. I want the software or method to easily put ALL the IDs in text file and CSV so I can use it for facebook custom audience advertising.
Facebook always changes things so I want the software or method to work always.
can you help? budget around $20. if you find a free method from the net which works and will always work in the future then
just give me that info, I will pay.