[RF_Savage]

SMS routing and billing systems did cost money. Especially billing, as the standards had nothing for it, so it was done by 3rd party software for a very long time.

[margalabargala]

Of course, how pleasingly circular. "It's so expensive because it costs so much to charge you for it".

[baq]

Exactly! AWS is so expensive because it can be so cheap. Billing was the true innovation.