"Gee, wouldn't it be nice if leechers could pay seeders instead of just leeching? There's a lot of hype right now about a tech that's supposedly good for building various kinds of Magic Internet Money; maybe we could integrate some form of that."

("decentralized" at least actually means something here - BitTorrent is already a decentralized protocol, there are no central BitTorrent servers that coordinate things. So anything that would be properly integrated with BitTorrent would have to be decentralized somehow.)