Their cloud pricing model is weird. It's cheaper per request for 250,000 requests than it is for 500,000. But it's cheaper for 2,000,000 than for 250k or 500k. Strange.
If this was a self hosted solution I'd buy it for a reasonable price.
We offer Docker deployments so that you can self host our platform in your own environment using your own database. $250/month per instance and $500/month per 3 instances. It doesn't matter how large your instances are or how much data you process.