We have an ad client who wants to target the followers of 18,000 accounts. Is there a way to do this beyond the public API rate limited and 5000 at a time?
The most common and robust way for our ad partners to retrieve data at scale is to work with either data partners or the Gnip data platform directly. https://partners.twitter.com/en/find-a-partner.html http://www.gnip.com
Thanks,
John