New ask Hacker News story: Ask HN: Trivial way to determine between ISP and cloud derived IPs?

Ask HN: Trivial way to determine between ISP and cloud derived IPs?
2 by johnnyApplePRNG | 1 comments on Hacker News.
I am considering creating a restriction preventing free credits from being doled out on my SaaS to users originating from a cloud-based IP address (AWS, Google, Azure, Etc.) Curious what any pitfalls of this approach might be? And any suggestions as to how to go about it? Simply adding all cloud based company ips to a blacklist would be a good start. Do any half-decent ones already exist before I create my own?

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