That doesn't really say much. Isn't the whole point of serverless to support high-volume, individually-inexpensive, invocations?
For context, 13B is like roughly a <strike>$2000</strike> (edit: more like $4000, sorry) spend on Cloudflare Workers, similar cost (harder to calculate but ballpark similar) on Lambda. That could be a single company spending the bulk of that.
(Further edit: Lambda pricing is way off too. See reply below.)