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

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