I'll bite, as I don't even bother looking at that section. Are you doing a map based campaign? If not then it could be a good idea, a quick suggestion is have a look at the Mighty Empires stuff (or whatever the
40K equiv is) and use the benefits of holding the relevant tiles to be used as bribes.
You could also use a set of cards (preferably different for both sides) that Horus/Emperor could use bribes in secret envelopes, maybe using a limited number per round. With a declaration to the
GM by each player of his standing and bonus for it, then the
GM could issue out games to be played plus missions and maybe secret objectives?
Good luck!