Currently I'm not near my computer to verify myself (I am on my phone, before bed), but can you get into walled-but-indexed LinkedIn/Pinterest content with "Goo

Currently I'm not near my computer to verify myself (I am on my phone, before bed), but can you get into walled-but-indexed LinkedIn/Pinterest content with "Googlebot" UA spoofing? I'd want to assume that their systems are more advanced than that (or if they're really in cahoots, maybe Google crawls them with a unique, secret bot UA to prevent this sort of thing), but I just got done with another thread where an ex-Tumblr dev said all user content was in a single S3 bucket without MFA delete so my gut feeling is lending a bit more weight to the "everything is held together with rubber bands and duct tape and it's only a matter of time before the jig is up" parameter than the "large, powerful companies tend to hire smart people that communicate and design robust systems effectively" one.