As someone who went through it, I think I know what you are asking. What you are really asking is "if 100 people send in refusal of recall responses or no response at all, will the company go back to the list and recall more people until they get 260 bodies on the line?"
No, they will not. There is a "fudge factor" built into every recall. They expect some percentage of those notified of recall to either refuse recall explicitly or refuse by not responding. It used to be 10%. However, when I was recalled in Nov. 2004, the refusal rate was almost 25%. By the time the contractual reply period has expired, it is too late to send more notices for the same recall dates and give them the same reply time.
If the acceptance rate is higher than expected, the company just deals with the overage--knowing that attrition will take care of the overage in due course.
A higher than expected refusal rate will mean that the next recall may occur sooner than planned. A higher than expected acceptance rate will delay the next recall.
The reason that the higher than expected refusal rate at my recall did not generate another recall is because the attrition rate slowed down after my recall. However, it appears to be picking up again.