There can be a custom solution to this. You can use a counter in JS to store the number of responses that have been received (After the survey page and before the end activity as depicted by Script 2 in the diagram below). You can store this count in a global variable (option) by using the setOption() method.
Now every time the survey is opened, you can add a JS validator (Script 1 in the above diagram ) that checks the current survey count from the option that you set earlier (using getOption() method). If it's less than 100, you can update a boolean variable and then use a test activity to validate the boolean and trigger the survey page or the End activity as per its value.