Matt Lane wrote and analyze how 2 students who made $600k within 24 hours by "giving away". Here is the summary:
In 2017, Alan and Brady post a picture of a girl in a bathing suit, sitting at a pool. They promised anyone who reposts it within 24 hours will receive a FREE bathing suit (retail value $64.99), just pay $12 for shipping.
Overnight, the post was shared and tagged 346k times. Their followers jumped from 7k to 784k. In the end, they can only handle 50k units give away.
Which, the total money received is
50k x $12 = $600,000.
The profit could be
over $240,000 for 50k units:
Estimated profit = $12 - $7.20 = $4.80/unit
Take away: Understanding the power of the “free for a limited time” model. A side note, make sure giveaway items quality is carefully inspected.