Are there recommended services where I can point to...say...an s3 object and validate it doesnt fall into some /all of the above categories? Seems like a good business and also something i'd pay for to remove this risk.
In my case, image uploads aren't mandatory for users, but they are very helpful in identifying the spammers (for some reason, the spammers almost always try to upload images that get filtered, so it makes it easier to spot them). That, combined with an IP check (getipintel.net) has almost completely eliminated the spam issues on my site.
I didn't know about this service and it sounds really cool. Kind of sucks that VPN = malicious since I use Mullvad for legitimate browsing purposes. That said, I understand that VPNs are often used a medium for illicit activities.