So, by way of hypothetical, consider this.
You go to small claims court and the first thing the judge does is order you to meet with a court services mediator. The guy says he can pay you $3,000 today, if that will end it.
You need to ask, can you ultimately collect the $9,000 even if you win? Is there some chance you don't win, i.e. does he have a defense to the claim? How much aggravation is it to you to collect the other $9,000. How long would you have to wait? And if you hire an attorney to collect the full $9,000 even if you do win, how much will the attorney charge you to collect it?
Main point is, people do not want to be taken advantage of and they sue. They decide "its the principle." But about the third time they have to take a half a day to go down to the courthouse to deal with it, and they may or may not get anywhere, principle goes the way of the Dodo bird.