I'm not aware of any real CDNs dropping someone for "load getting too high". Also, for a real CDN, 100k+ clients isn't noticeable.
If you're talking about the "unlimited traffic" or "price too good to be true" commodity delivery resellers, their business models are sometimes built on overselling and like a cell provider, those will throttle or drop you.
That said, a "network of networks" is a great strategy beyond a certain level of traffic. Nine Systems built a great business on that principle for video streaming until purchased by Akamai. Balancing video over multiple CDNs is a service we offer as well.
Finally, if your CDN SLA doesn't hold the CDN liable for going down, you're doing it wrong.
If you're talking about the "unlimited traffic" or "price too good to be true" commodity delivery resellers, their business models are sometimes built on overselling and like a cell provider, those will throttle or drop you.
That said, a "network of networks" is a great strategy beyond a certain level of traffic. Nine Systems built a great business on that principle for video streaming until purchased by Akamai. Balancing video over multiple CDNs is a service we offer as well.
Finally, if your CDN SLA doesn't hold the CDN liable for going down, you're doing it wrong.