This sketchy company lets mobile app developers monetize user base by letting other people pay $$ to route requests through random people’s mobile IPs: https://brightdata.com/
Similarly NordVPN owns Oxylabs (who mostly hack routers and cameras and sell those as residential IP’s).
Mostly to avoid hitting 'ddos protections' or other security bullshit that doesn't really make sense on 1 daily request or so.
I think these companies used to go for extension developer now it seems they have found new idea to implant malware on apps which is not easy to detect.
As a scraper operator on a mobile data connection all you need is a new useragent and browser fingerprint, there's no easy way for a scraper-blocker-operator to tell that you're not a totally new person.