The clouds don't do any filtering or mitigation for free. They just have enough bandwidth to pass the attack through to your servers and services. You're just m

The clouds don't do any filtering or mitigation for free. They just have enough bandwidth to pass the attack through to your servers and services. You're just moving the bottleneck here, as now you need to use a cloud DDoS mitigator like Silverline, Cloudflare, prolexic. You probably would have been better off using a cloud mitigator from the start. Their pricing is competitive when you factor in all of the costs.