Why? I really wonder why. I doubt that 15GB vs 5GB really matter from point of view of costs. I'm concern that is solution to "solve" some scalability problem

Why? I really wonder why. I doubt that 15GB vs 5GB really matter from point of view of costs. I'm concern that is solution to "solve" some scalability problems with their design or infrastructure. This reminds me when Evernote issued ridiculous API throttling - that point of time was beginning of the end of Evernote. This could be also that they are hoping that people will upgrade OneDrive storage - but I doubt that 15GB matters: 15GB today is 5GB in one year.