I recall someone who worked there describing people being paid to do nothing, just so they wouldn't be hired by anyone else. Sounded like they had fat to cut.
Regarding their product and viability, I've always relied on their product and have found it to generally perform better than OneDrive or Google drive. But I can get 1TB of OneDrive for $70/year with all the Office apps and I need Google drive for my phone's photos, so I've never seen the point of paying DropBox. Their value prop was commodified.