I'm not an expert in BitTorrent, but in my mental model, aren't you siphoning away seeders from the _official_ Ubuntu trackers by using burnbit?
I can appreciate using burnbit for certain behemoth companies that don't normally publish via torrent, but since ubuntu.com actually offers them along-side the isos, this smells counterproductive.
In this case yes. The torrent file from burnbit appears to list only the burnbit tracker.
A torrent file can list multiple trackers. It would make more sense for burnbit to take the official torrent and add their tracker to the list, allowing a client to make use of the peers listed by their tracker and the official tracker.
The offical torrent provides both IPv6 and IPv4 trackers, which is nice.
I can appreciate using burnbit for certain behemoth companies that don't normally publish via torrent, but since ubuntu.com actually offers them along-side the isos, this smells counterproductive.