[ragall]

In what way is Fly's pricing unpredictable ?

[airstrike]

It varies based on usage

[ragall]

Isn't that how things should be ?

[airstrike]

From a consumer's standpoint, why would I choose that?

[ragall]

It's a natural law to pay based on what you consume. Whenever that isn't required, you're typically being subsidized in a form or another, but don't be surprised when it goes away.