What's the actual usecase for this? I'm a little bit wary of letting the local hosts hammer the frontend web service without justification :)

My usecase was to cook 500 vault bundles at once. Vault requests are painless for the web frontend, the rate limit is only for the backend.

As i said on IRC, I'm totally for having per ranges limits, so that we can keep a limit without being too large. But this requires some code change to allow a different limit depending on the range, so I'd rather have an exemption in the meantime.