-most of the existing aliases for tagging purposes
-ID retention from derpi (no conflicting IDs when you want to search something + doesn't fuck with dupe saves)
-Best DNP policy (though it could at least have a _delayed_ upload for art packs, so the artists can make at least *some* money), which makes it the purest archive site.
Downside is the actual user traffic. Came out the gate the latest, so it's got a fraction of the userbase that the others have. Well, that and an unknown number of existing derpi IDs missing/errored.