Who Pays for "Free" Net Calls?

For now, ooma isn't paying big carriers to use their networks, but that could change if business takes off

The staggering variety of free stuff available on the Internet sometimes seems to have repealed the first law of economics: There's no such thing as a free lunch. But as so often happens, the dismal science actually has it right. When it looks like you're getting something for nothing, somebody is paying, and it's often instructive to know who that is.

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