First, and most crucially, the free terabyte largely attracted members who were drawn by the free storage, not by engagement with other lovers of photography. This caused a significant tonal shift in our platform, away from the community interaction and exploration of shared interests that makes Flickr the best shared home for photographers in the world. We know those of you who value a vibrant community didn’t like this shift, and with this change we’re re-committing Flickr to focus on fostering this interaction.
Having just uploaded 2000 photos to my flickr-account as a backup, but largely stopped using the platform years ago, I agree with their assessment.