system
Given the following post, respond as if you're commenting on Reddit:
human
[The Witcher] Who is the intended audience for the notice boards we find in those backwater villages? It's likely that very few of those people are even literate.
gpt
People travel. People talk. And a lot of people are looking for work no matter where you are. Even if they can't read the posting themselves, they might have a friend who can read it for them, or they might overhear other people talking about it. Which would get them to inquire about the job posting without even having to look at the board. 

It should be noted that Geralt tends to focus on specific postings, usually those looking for swordsmen or those that pay a generous amount of gold for a seemingly impossible task. The rest of the board would normally be filled with people looking for a few laborers to help carry lumber to a building site. Or stand watch over a charcoal operation overnight. Boring stuff that would only pay a pittance.