You also have to take into account the number of people it takes to run the data center operations in looking at the total costs. If they had 20 people required

You also have to take into account the number of people it takes to run the data center operations in looking at the total costs. If they had 20 people required to operate running their own servers, that's probably around $2m/year in personnel costs, whereas they might be able to reduce that to, say, 5 people and save $1.5m just on that.