I can see a use case for this if you were sending personalized emails from Sales and they did not want to get overwhelmed by responses. Native functionality in Eloqua and when I worked on that platform that's what I used it for, anyway.
You could create sub-lists and use a trigger campaign to move leads onto the various sublists based on score. Then create one campaign where you have choices - If is member of list [LIST 1], then send email. If not, do nothing. Wait step. If is member of [LIST 2], then send email, if not do nothing. Wait step. I don't know of a way to do it where you could say stop at 100 leads....
I don't know if this would save time, though....