20+ years ago there were mail blacklists that basically blocked residential IP blocks as there should not be servers trying to send normal mail from there. Now you must try the opposite, blacklist blocks where only servers and not end users can come from, as there is potentially bad behaved scrapers in all major clouds and server hosting platforms.
But then there are residential proxies that pay end users to route requests from misbehaved companies, so that door is also a bad mitigation
It's interesting that along another axis, the inertia of the internet moved from a decentralized structure back toward something that resembles mainframes. I don't think those axes are orthogonal.
20+ years ago there were mail blacklists that basically blocked residential IP blocks as there should not be servers trying to send normal mail from there. Now you must try the opposite, blacklist blocks where only servers and not end users can come from, as there is potentially bad behaved scrapers in all major clouds and server hosting platforms.
But then there are residential proxies that pay end users to route requests from misbehaved companies, so that door is also a bad mitigation