I think the decade lists were a bit underwhelming considering not too many people were actually using Spotify all that much 10 years ago. I still got a ton of my music from CDs, iTunes downloads and other more nefarious places.
Meanwhile in Denmark or Poland there is very little in terms of data limits.
Eventually, Spotify released its official mobile apps and a web player so the project had no use. But it was fun times, it was really marvelous how anyone could find their favorite music from the service and listen to them in good quality without a torrent connection.
Nowadays, I think all those friends who used the hack are Premium subscribers.