Past a configurable free quota the gateway answers 402 with the offer instead of 429, because the moment a caller runs out of free requests is the best sales pitch a site gets.
freeQuota: 100for 100 requests a minute, free, no account.benefits: [...]lists what a pass unlocks, on the sales page and in the 402 body.- A valid pass is now read before anything that can refuse, so a pass holder is never metered.
- The sales page, robots.txt and .well-known stay reachable when the allowance is spent.
On rotating addresses: the default identity is the caller's address and a proxy rotation defeats it. That is documented rather than patched. Residential bandwidth is billed by the gigabyte and passes a dollar on the first day of any crawl worth rotating for, so the throttled page makes that arithmetic instead of pretending to be undefeatable.