He can earn by seeding, but still you need some initial capital, to download even 1 file.
2. Transaction fees:
If I understand right you get UFR by seeding and spend it by downloading, but some of that goes to cover gas cost. So in the end you have to seed more than download, but you can't seed if there is noone that downloads.
Taking all the system into account, someone will have to constantly buy or create new tokens?
I assume you can bring content you already have over. In which case you start seeding them for free, and you have a UFR income that way without initial capital required.