It could be $0 on Render too, but then there's going to be a 3 minute load time for a landing page to become visible, lol. So if you don't want your server to sleep, you're going to have to pay $20/month.
Static pages, sure. But what do you do if you want a contact form or something? Yeah, you can use services like formspree, but then you may end up paying $20/month for that alone. Perhaps I'm just ignorant.
Does Vercel do the same?