Also, note the difference between upstream and downstream bandwidth. If someone was streaming to the corporation, they would be using their own upstream bandwidth while the corporation would be using its downstream bandwidth to receive it. Then the corporation would be using its upstream bandwidth to rebroadcast it. Most connections are asymmetrical, with significantly higher downstream vs upstream. It would have been their upstream bandwidth that was getting hammered and needing to be upgraded every three months.
For example, Comcast's Performance Pro offers 150 Mbps down, 5 Mbps up, and the next tier, Blast! Pro offers, 250 Mbps down, 10 Mbps up. Try asking them how much they'd charge for 250 up/250 down. Just remember to convert krugerrands and vital organs into $ using current market rates.
Realistically, the only way to keep increasing upload speeds at the corporate level is to have fiber strung.