So I read this article and immediately signed up for the service. "Hmm, looks great" I thought. Then I look at their helper libraries, "Better than Twilio!" I s

So I read this article and immediately signed up for the service. "Hmm, looks great" I thought. Then I look at their helper libraries, "Better than Twilio!" I said. Then I examined their pricing, and it's cheaper than Twilio! ...Then I realized how their billing works: It's a prepaid model. And I'm so sad to say, this won't work for me. Any chance of invoice-billing coming soon?