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For some products wide platform support may be more valuable than what simple metrics show.

Why? Core utilities such as file sharing and password management simply need to work all my devices. If I have to use one password manager on Mac and another on Linux, there is no point in having a password manager. It gets even more absurd with file sharing. Should I use iCloud on Mac, and OneDrive on Windows, and Samba for the Linux machine? Absolutely not! Dropbox is the clear winner as it supports all three platforms. I'm an Office 365 customer, and yet I have no use for OneDrive, since there is no reliable first-party Linux client. After getting burnt with a flaky third-party OneDrive Linux client I decided to fork over money for Dropbox.

For products like Dropbox or KeePass wide platform support has wider impact than number of computers connected from that platform. In an organization with 3 people on Linux and everyone else on Windows, support for both platforms is a strong differentiator over competing products.