Just use a static hoster for a blog site (like netlify or even github pages).
if something goes crazy and you end up using a wild amount of outbound data, it looks like the next jump up is only to $12
Their app platforms' bandwidth pricing is pretty painful at 0.10$/GB. With these prices and considering the app platform lacks functionality like multi-regional droplets or VPC integration, they are a subpar choice even compared to Firebase or Amplify.