You’re allowing Smash Topic to share a single message on your behalf. This only happens when you click the button on the campaign page to support with Twitter or Facebook. After the campaign is complete, we won’t post any additional messages.
In order to calculate number of impacts for Facebook, we'll need the "Friend list" permission. We'll never interact with your friends' accounts, store their information, or post on their behalf. We use that permission for the sole purpose of calculating the number of impacts.
The impacts are the sum of the number of followers and friends of those who have supported a campaign. For example, if 3 people with 200 followers have supported a campaign, that campaign has 600 impacts.