The main issue is that we have some customers who use EnvKey with hundreds of servers and only one or two users. This, of course, doesn't work out very well for us in terms of unit economics and pricing based on the value the service provides.
That said, the usage caps are meant to be generous and not get in the way. If you're using EnvKey in a 'normal' way and not spinning up thousands of parallel processes or something along those lines, you'll be way, way under the limits on config requests. For connected servers, it's really just a question of how many server instances you're running that use EnvKey, which is something I would think you need to plan for anyway when it comes to hosting costs.
I'm very open to adjusting these based on feedback if they are getting in the way / not matching up correctly with value. But as much as I'd prefer otherwise, I'm afraid there do need to be some sort of usage-based limits to make it work.