[kazz]

It looks like that's basically what they are (https://smartproxy.com/blog/what-is-a-residential-proxies-ne...).

A residential proxy is listed as an "IP address provided by an Internet Service Provider", but I still don't really understand how they get access to them. ISPs have to be selling them access, right?

[paulryanrogers]

My guess is free VPN services and browser extensions which resell your residential network in tiny chunks.