Wow that's indeed very bad from Netlify. From every Vercel document that I can read though is that when you exceed the limits of free tier they are just locked

Wow that's indeed very bad from Netlify. From every Vercel document that I can read though is that when you exceed the limits of free tier they are just locked for 30 days unless you upgrade to Pro. So unless I am mistaken this cannot happen on Vercel.