I'm Ryan, one of three devs that built FraudGuard.io. The answer is basically price. We do EVERYTHING ourselves and try to keep price extremely fair. We have plans that start at $10 /month and we also have a small free-for-life plan too.

Thats the best answer. The secondary part is we want a simple way for any dev off the street to integrate with api.fraudguard.io in 5 minutes. Imagine you are a small company and you want to limit back office access to you CMS to only IPs outside of Germany. That takes just a couple minutes. Or you want to allow back office access to you CMS from everywhere but you want to decrease the session timeout to only 30 minutes if the originating IP is a tor node or public proxy, etc.

We just got out of beta (literally last night) but so far thats the majority of use cases that we've seen so far.