Ask HN: How to reduce malicious free trial abuse?
I'm starting to get a ton of dedicated malicious spam free trial signups at my fintech startup, these don't appear to be robots so I don't think a CAPTCHA will help. They use the service aggressively during the free trial but don't pay. IP bans won't help either, they seem to come from a large number of IPV6 addresses. Here's what I'm considering:
1. Phone number / SMS verification. 2. Credit card required to start free trial
Any other ideas?
2 comments
[ 3.0 ms ] story [ 14.5 ms ] threadStep 1 - Free Trial version has limits. Look at users who do pay for a sense of where to set those limits.
Step 2 - Limited Number of Free Trial accounts. Perhaps with a separate pool of 'em for requests from IPv6's, or based on geography, or ...