Pretty risky given the rate limits of Let's Encrypt are non negotiable with no choice but to wait them out.

They are quite literally negotiable: https://isrg.formstack.com/forms/rate_limit_adjustment_reque...

There are also a bunch of rate limit exemptions that automatically apply whenever you "renew" a cert: https://letsencrypt.org/docs/rate-limits/#non-ari-renewals. That means whenever you request a cert and there already is an issued certificate for the same set of identities.

	▲	dextercd 33 minutes ago \| parent [-]
		Your comment is 100% correct, but I just want to point out that this doesn't negate the risks of bob's approach here. LE wouldn't see this as a legitimate reason to raise rate limits, and such a request takes weeks to handle anyway. Indeed, some rate limits don't apply for renewals but some still do.