A few reasons. To list a few:
- It puts us in a position of authority over other genin, aside from just "we beat you up" (though we'll do that too if necessary)
- It spreads out the Party Trick seals over multiple groups so that Mist has a harder time arguing against their validity
- It gets us a bunch of spent seal casings to hide party trick seals in, making it harder to spot them (and more likely for them to count)
- It allows us more opportunities to make friends and influence people
- It establishes us as clever support ninja who can be traded with
- It makes us valuable to other ninja in a way that may lead to them defending us, making it less likely for an anti-Leaf alliance to form
- It masks our combat ability (nobody expects the clever support ninja to be able to kick as much ass as we can - at least, not until the tournament when they are sorely disappointed)
Essentially, this is an exchange in which other teams get:
And we get:
- Better chances of party trick exploit working (via spreading them out among different nations and via collecting proctor seal casings)
- An excuse for Leaf ninja to collaborate (letting us keep our position as defacto head Leaf genin)
- Better chances of all Leaf ninja making it to the finals (since we give them seals for helping us, and an opportunity to store things they acquire somewhere safe (Pangolin realm))
- An easy opportunity to have information exchanges (via diplomacy and storage seal trading while visiting ninja are waiting for us to finish their work)
- Intel on the competition by seeing who comes to us, what sorts of wounds they show, any opsec breaches they commit in our presence etc.
- Establishment of ourselves as people who think outside the box and turn competitive situations to new paradigms where everyone benefits
I'm pretty sure the incentives line up for everyone in the stack of "people who are in the chunnin exams." Since you'll be writing the chapter, and this is likely to come up, would you like me to more explicitly talk about this, or link to this post inside the action plan?
Edit: so to look at this from the perspective of various players in the exams:
when trading defunct seals for functioning counterfeits:
Hazou and his immediate team gain:
- Lower likelihood of having fortress attacked (since other genin are unlikely to bite the hand that feeds them)
- Additional information on enemy teams (since we will see high numbers of enemies in groups)
- Establishing themselves as paradigm shifters
- Ability to hide much of our combat abilities by avoiding combat for now
- Additional likelihood of counterfeit plan working, since more people would be in on it
- Time to diplomance away for information via selling seals
- Potential for making ourselves an information trader (depending on how many groups pass through us)
Non-Leaf nin who take the trade gain:
- A point for this event where they had none before (due to defunct seals)
- The opportunity to trade information for seals, or potentially information for information
And other Leaf-nin gain things from helping us do this because it grants them:
- Access to some of the stupid numbers of seals Hazou will be making, thus significantly higher scores for this event, potentially without even needing to do anything (unless someone wants to attack the doom fortress made by the sealmaster)
- Ability to hide many of their combat abilities if they desire
- Free information on enemy teams (since they'll be coming to the fortress)
- Potential for additional information on the exam itself (since there'll be a fair amount of information around)
- Clean, dry, relatively safe, non-chakra beast infested places to stay
- Clear direction with reasonable assurance of victory where they may not have had it before
