Need to be Affiliated!
No one wants to be alone or be the only one doing something. Affiliation is a huge key to feeling a part of society. the feeling of being part of a huge group is something advertisers really try to target. This example from Verizon shows that there is a huge group of people switching over to Verizon, this would make a view feel like they aren't the only one switching carriers, and will be more likely to switch over.