I'm not aware of there being any SLAs for these services?

I'm hoping that was a joke. Most people don't even pay for it.

Did this affect gsuite as well? Either was I'm sure the TOS would never allow it. While you're at it suing google, might as well get a precedent set making TOS unenforceable.

This did affect us on gsuite. We were receiving an error telling us we were blocked due to unusual suspicious activity coming from our ip. It was pretty misleading and took a little bit to realize that wasn't the case.

Did you have retry logic that triggered when Sheets started failing requests? Maybe that looked like a DDoS attack while the problem persisted.

Google internally use the DDos blocking system to block requests to reduce load on critical systems during outages. (It's common for systems to require reduced load during startup because caches are still filling and user requests after an outage are often more expensive to process)

user agreement should be enough, with proper attorney