Do lots of people get disseminated intravascular coagulopathy, or is it unusual?

DIC. Disseminated intravascular coagulopathy (dic) is very rare outside the intensive care unit or in patients who are very sick. Dic is usually seen in patients with overwhelming infections that lead to multiple organ failure, therfore, it is typically seen in a patient with serious infection who is sick enough to required intensive care management. Patients who have dic have a very high risk of death.
Very uncommon. Luckily, dic is a very uncommon condition, because when it does happen it is extremely dangerous and can cause a person to bleed to death.