Inexpensive, not Reliable (5)
Example ISP ships 10 terabits/month (approximately 40 megabits/second average)
If exclusively by transit, $5,000/month.
If 50.001% by transit and 49.999% by reliable exchange, $12,500.05/month.
If 50.1% by transit and 49.9% by unreliable exchange, $3,005/month.
Reliable exchange saves $4.95 of transit, but costs $9,500 extra each month.