Re:Ask HN: How do you reduce fraud signups?
by billhodak on Thursday March 16, 2017 @04:29PM
(#13888873)
Sift Science (YC S11) offers machine learning powered services for preventing fake account signups and promotion abuse. (Disclaimer: I work for Sift Science)
https://siftscience.com/products/account-abuse
https://siftscience.com/products/promo-abuse