Tim_Ward, unfortunately that wont really help, because torrents are not only usually posted to multiple sites, but there are torrent sites which index other sites torrents as well.... basically they spread.
What I do is put up torrents of each patch as they come out. And when there is a good stable version of the demo I intend to put up multiple torrents of that. A slightly different form of marketing you might say
As to the suggestion of seeding bad torrents, yes it will work, but the word usually gets spread pretty quickly if a torrent is bad. So it would be necessary to seed a new torrent occasionally, make sure it is the EXACT same size as a real SEV upload would be. And the file name would have to be something like spaceempires5.iso,or as a rar file. If you are just seeding a bunch of random files, it wont work. Because the bittorrent clients report the names of the files they are downloading.
And yes, if it is not obvious I am frequent torrent user. I download lots of porn, old movies, and tv shows. So I guess I'm a pirate, arrrrr.