As part of our pro plan, you can increase engagement with the viral share entry method. Users are allowed to share your giveaway with friends for extra entries.
Here's a live example of a SweepWidget viral share giveaway.
In the admin view, you can select what ways the users can share the giveaway. You can also pre-format a default message body.
When a user is entering, they can choose which way they want to share your giveaway. They can also copy/paste their unique link and share it in any other ways they choose.
The users can share to unlimited friends and will get how ever many entries you specify for each person they refer.