Adding respondents after your poll is complete widens your sample size. Adding respondents to a completed poll is a better option than re-running the same poll separately. By using the Add More Respondents function, you're guaranteed that none of the respondents are the same as the ones you already polled.
To add more responses, click the "+More Responses" button near the top right of your poll results.
On the next screen, you'll see a drop-down to increase your respondents. This drop-down will show the price of the addition according to plan tier (Free Forever, Starter, Professional, Business, or Enterprise).
Choose the option you want, and complete checkout by clicking on the "Complete Order" button.
Note: PickFu Panel polls completed more than 120 days ago cannot be extended with more responses.