They just don't have access to giant pools of residential IPs, so too many sites end up blocking all the cloud providers by IP range/ASN anyway, even if they could get through a captcha.
google has a large amount of "caching servers (GGC)" located in data centers for residential providers all over the world.. They use these servers for a variety of services.. Most of the traffic I have seen from them have been for their "URL preview" service ..
they kind of do.. gcp has their lambda equivalent which i believe comes with chromium preinstalled, its how major search tools like jina work, sure thre problaby somethign about session management that they probably neuter to prevent abuse though
