People new to deployment have always been nervous about unanticipated spikes in costs.
I think this snippet from an HN comment points to why those fears are still quite reasonable:
> Just a few years ago badly behaved scrapers were rare enough not to be worth worrying about. Today they are such a menace that hooking any dynamic site up to a pay-to-scale hosting platform like Vercel or Cloud Run can trigger terrifying bills on very short notice.