OneTime Premium offers you to upgrade a single poll. Check out the premium benefits on the Plans & Pricing page.
Navigate to the Plans & Pricing page from the poll settings drop down menu or from the top menu.
Locate the "Buy OneTime" button in the OneTime Premium column on the Plans & Pricing page. Follow the simple checkout steps for buying the OneTime Premium.
After you’ve bought the OneTime premium upgrade you’ll have to apply it to a poll of your choice. Your polls will now show a link to enable you to upgrade the poll. Click on the link if you are in the poll that you wish to upgrade.
When you have upgraded your poll it will show a "premium" banner above the poll’s title in the organizer’s view. The guests won’t see a change.
In the poll’s settings drop-down menu you’ll see all the Premium benefits enabled, like adding a cover image, or downloading the poll’s data.