OTTO's history of using data centers is long and full of anecdotes. When I myself joined OTTO in 2010, most cloud providers were still in their fledgling state and cloud computing was far from being state-of-the-art for running heavy workloads. Besides the immaturity of the technology used and legal restrictions for using cloud providers, the company was not in a position to use a cloud provider. Cloud providers started offering virtual machines on demand. But the costs for having such machines run 24/7 were quite high compared to running virtual machines at an on-prem data center.