I just finished running my first session of EC. I botched the rules for the actual performance horribly, as with all of the NPC events and combat encounters, there was just so much going on that I totally misunderstood how to run the actual Circus.
Now that I've read through it a few more times, I feel like I have a much better grasp of it, except for one thing.
Why would the PCs bother doing this?
Any money they earn can only be reinvested into the Circus, which only serves to earn more money that can only be reinvested back into the Circus.
They don't gain anything for themselves. No XP, no money, no anything. They have to spend an entire week of downtime for each Performance, which means that they can't do other downtime stuff, like retrain, or, you know, earn income.
I thought maybe some required part of the adventure would be Prestige gated or something, but I don't see anything in either of the first 2 books to indicate that.
Other than the chance that the players just really like rolling Trick Checks, I am having a hard time seeing how I am supposed to entice the players to participate in the Circus, as it costs them resources, and gains them nothing at all.