I had stuff with mediafire.com as they give 12gig free, a lot more than dropbox's free 2gig, but users complained about adds.
Mediafire is suppose to be more permanent but I don't think dropbox is, as Levy's may of expired.
So these new links may die also eventually.
Maybe PG need to allow users to upload UserTracks to their server so it's permanent.
I hope they get all the missing requested usertrack features fixed this year !!!!