[cldellow]

I run a Google Sheets-based SaaS. The default limit is 60 write req/user/min and 60 read req/user/min.

In my experience, that's plenty!

Especially so since Sheets has a very advanced API relative to, say, Airtable. For example, you can do atomic updates of multiple sheets in a single request. A single request can contain like 100MB of data. (It'll be very slow, and at this point, a person should question their life choices, but it'll work.)

[Varqu]

We hit 60 read/write req/user/min pretty fast and yes, theoretically you can scale with the user numbers in GCP and by rotating them.