My reason: I want to create things that other people can run on their own for ~free and scale with usage. Services that can spin down to 0 (or under a free tier) are ideal. Examples: Lambda, S3, DynamoDB, Cloudflare DNS.
If you have to pay $5 for Cloudflare Workers, $5 for some more page rules, $13 for your (light usage) Postgres instance, $7.50 for your t3.micro, you're already at $30/mo baseline and you're not close to high availability.
If you have to pay $5 for Cloudflare Workers, $5 for some more page rules, $13 for your (light usage) Postgres instance, $7.50 for your t3.micro, you're already at $30/mo baseline and you're not close to high availability.