Addendum 2: If you want to feel really dirty, go to https://proxyway.com/reviews?e-filter-da2a7bc-reviews_categories=proxy-providers for a collection of reviews on these services. It's a huge market and I am 100% convinced that "AI" web scraping is currently the biggest "growth" driver for these companies.
And when I see that quite some of them rely on injecting SDKs into 3rd party apps to "extend" their "Reach", I would call these "residential proxy providers" malware/botnets. But that's just my personal opinion. I am sure they are all legit.
7/8