Oh sure, we had many outages. More outages on the one service where we tried using loadbalancers because the loadbalancers would take a one hour break every 30 days (which is pretty shitty, but that was the load balancer available, unless we wanted to run a software load balancer, which didn't make any sense).

We didn't have many outages due to DNS, because we had fallback ips to contact chat in our clients. Usage was down in the 24 hours after our domain was briefly hijacked (thanks Network Solutions), and I think we lost some usage when our DNS provider was DDoSed by 'angry gamers'. But when FB broke most of their load balancers, that was a much bigger outage. BGP based outages broke everything, DNS and load balancers, so no wins there.