1. To receive discounts and promos.
2. To show support for brand to friends.
3. To get a freebie.
4. To stay informed about company activities.
5. For updates on future projects.
6. For updates on upcoming sales.
7. Just for fun.
8. To get access to exclusive content.
9. To learn more about the company.
10. For education about company policies.
source-- Likeable social media, Dave Kerpen