I know this is the case with probably all major clients to them. If I remember correctly from talking to Dropbox employees during a recruitment visit, they had

I know this is the case with probably all major clients to them. If I remember correctly from talking to Dropbox employees during a recruitment visit, they had spoken about how they helped Amazon AWS reach milestones as they accounted for approximately 50% of AWS's file storage service usage. Obviously this is done all programmatically as everything is at an extremely high scale.