My group just finished Chapter 7, and after updating their Prestige level with various groups, I noticed their Flint (or Populist) Prestige was looking pretty low. After a cursory glance through the Act 1, 2, and 3 pdfs (4e), mainly at the 'Rewards' section at the beginning of each Chapter, where Prestige increases are usually noted, I found that there actually aren't many opportunities to increase that particular group's Prestige.
- It increases once during Chapter 2, after you save Flint from arson and/or a witchoil flood.
- Another +1 can potentially be gained during Chapter 3, if you help out the working class of the city.
- If you save the city from the bomb and/or Borne in Chapter 5, you can increase it again.
- One near-obligatory point to make it possible for a group of PCs to get to Prestige 6 at all.
- One to make up for a lack of a Docker in the party.
- One optional point if they missed the opportunity in Chapter 3. If they miss this one too, they deserve to end the campaign with Prestige 5 or less.