[mdavis6890]

They need to charge enough per unit of service to make it worthwhile. And people need to understand that they need to pay for services. Not everything is free.

Subscriptions are a good model for things that you use often and regularly. PAYG is better for things that have high value when you need them, but you don't need often.

I can see services like this offering both, and customers choosing one or the other based on their usage pattern.

You see this with movies already, and I think it works well: You can subscribe to the monthly and watch whatever, whenever. Or just rent movies when you occasionally want to watch one. Both are cool.