Navigating the choices in Kingdom Come: Deliverance 2 can be tricky, especially during side quests like Post Scriptum. This guide will help you decide whether to aid the miners.
Initiating Post Scriptum:

This side quest begins in the Kuttenberg region. Find the tavern west of Kuttenberg and speak with Kvyertsolav to initiate the quest. You'll be tasked with writing a letter for the miners. The phrasing of the letter doesn't significantly impact the outcome. After writing, the miners may attempt to attack; a successful Speech check will defuse the situation.
Should You Betray the Miners?
You have the option to turn the miners in to the bailiff. This ends the quest quickly, yielding a paltry 100 groschen. This is not the optimal outcome.
Helping Markold or the Miners:

Delivering the letter to Markold presents a crucial choice. Blackmailing him is difficult and unrewarding. Helping Markold involves killing three miners, netting a meager 60 groschen – the least desirable result.
The best approach is to deliver the letter as intended. Markold will pay you seven groschen and direct you to meet miners north of the city. Assist the miners in defeating Markold. This yields a reward of 160 groschen and improves the miners' working conditions.
In conclusion, aiding the miners in the Post Scriptum quest offers the most rewarding outcome in Kingdom Come: Deliverance 2. For more game tips and strategies, including guidance on other quests and romance options, consult The Escapist.