I'm assuming that you might not be aware of AWS pricing.

It's actually incredibly complicated and often very difficult (if not impossible) to predict. We have a dedicated part of our organisation which exists solely to figure out costs ahead of time for project.

I'm not sure if it's intentionally obfuscated, I would suspect not, because "pay for what you use" can be broken down into many areas.

    It's actually incredibly complicated and often very
    difficult (if not impossible) to predict.

Not a joke: there are people that optimize aws bills for a living.

There are startups that build specialized AI to optimize AWS bills for a living.

Azure is the same and Microsoft spent 20 years making their software licencing more and more unpredictable.

It absolutely is a strategic choice and not an accident.

This is the main reason I don't use it. I like having predictable monthly pricing that remains consistent.

What is incredibly complicated about Lightsail? That’s kind of the point of it.

Egress charges.

Lightsail and digital ocean give you 1TB egress minimum included in billing. Now try to input that number into EC2 instance. If I am not wrong, that turns out to be 130$ approx