If you're running a survey that relies on statistical significance, then you probably only need a certain amount of people to respond to it. People generally use sample size calculators to determine this number. We really like this one, but you can find a number of them if you do a search for "sample size calculator".
We have a feature that allows you to pause your survey once you've received a certain amount of responses for these use-cases. This option can be found within the targeting section of your survey and is available to subscribers of our Startup, Growth, Turbo Growth and Enterprise plans.