No doubt that harnessing influencers would be a lucrative business for both companies and influencers.[54] The concept of 'influencer' is no longer just an 'expert' but also anyone who delivers and influence on the credibility of a message (e.g. blogger)[49] In 2014, BritMums, network sharing family's daily life, had 6,000 bloggers and 11,300 views per month on average[55][56] and became endorsers for some particular brand such as Coca-Cola, Morrison. Another case, Aimee Song who had over 3.6m followers on the Instagram page and became Laura Mercier's social media influencers, gaining $500,000 monthly.[55] 

Many customers may not be willing to take part in referral marketing program simply because they don’t know how the personal details collected will be used by the company. It is better to build rapport with the company by asking them to rate your product or subscribe to newsletters. Before announcing the referral marketing program, privacy clauses and confidentiality clauses should be communicated to them so that they feel confident about referring people to you.
Among the first to write about viral marketing on the Internet was the media critic Doug Rushkoff.[16] The assumption is that if such an advertisement reaches a "susceptible" user, that user becomes "infected" (i.e., accepts the idea) and shares the idea with others "infecting them", in the viral analogy's terms. As long as each infected user shares the idea with more than one susceptible user on average (i.e., the basic reproductive rate is greater than one—the standard in epidemiology for qualifying something as an epidemic), the number of infected users grows according to an exponential curve. Of course, the marketing campaign may be successful even if the message spreads more slowly, if this user-to-user sharing is sustained by other forms of marketing communications, such as public relations or advertising.[citation needed]
Promotional videos can foster trust as well. Some consumers are still skeptical about buying products and services on the internet because they fear fraud and cheating. But effective marketing videos present your products in a conversational form. That creates a sense of individual approach which is why 57% of consumers say that videos gave them more confidence to purchase online.
Vlogging has become huge on Youtube. Vloggers film multiple aspects of their daily lives whether they be mundane, like preparing breakfast, or exciting, like going on vacation. Businesses and entrepreneurs have slowly been invading the vlogging world lately; and in 2019, you can expect this practice to become even more popular. Reason? Vlogging gives your viewers a peek into your life and can help you form a better connection with your audience.

In one option, current customers are given an incentive. The referral rewards can be in different forms, such as cash, prizes, discounts, shopping vouchers, or redeemable points. [4]For example, mobile phone operators give a referring customer a one-time reward and add long-term savings depending on his or her individual usage. The operators also offer a lower rate for interactions between customers than for interactions with noncustomers.[8]


According to a paper by Duncan Watts and colleagues entitled: "Everyone's an influencer",[66] the most common risk in viral marketing is that of the influencer not passing on the message, which can lead to the failure of the viral marketing campaign. A second risk is that the influencer modifies the content of the message. A third risk is that influencers pass on the wrong message. This can result from a misunderstanding or as a deliberate move.
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