One thing to note is that 500% margin only comes once you scale.
To start off vercel makes devops so damn easy that you dont
even have to think about it.
Context: I run a 8k MRR startup with nodebackend & sveltekit frontend, kit is on vercel we still pay $40/ month and have like 3 more side projects on
the same business account.
Tho yes, I've seen instances of crazy bills when you hit scale, but reaching that stage is insanely hard if you also start allocating
decent amount of your time to devops instead of marketing.