The main difference between referral and affiliate marketing programs is that a referral program is a program where you're structuring it for your customers to refer people they know and an affiliate program is structured for people that have not used your product or service themselves to promote it to people they don't know in exchange for a commission.
The General Data Protection Regulation (GDPR), which took effect on May 25, 2018, is a set of regulations governing the use of personal data across the EU. This is forcing some affiliates to obtain user data through opt-in consent (updated privacy policies and cookie notices), even if they are not located in the European Union. This new regulation should also remind you to follow FTC guidelines and clearly disclose that you receive affiliate commissions from your recommendations. 
But this “old school” method of making money online is still going strong because of all the benefits it offers to small-scale, solo internet entrepreneurs. And it’s an especially powerful business model to those without much experience doing business online. Many successful online business owners make their first dollar online with affiliate marketing.

(d) Local Associate Consent. By accepting this Local Associates Policy, you hereby grant to Amazon a non-exclusive, irrevocable, worldwide, fully paid-up, royalty-free and perpetual license in all languages to use, copy, reproduce, adapt, distribute, transmit and display your name, photo, logo and other trademarks or materials provided to Amazon in connection with the Local Associates Program (“Local Associate Marks”), solely in connection with the promotion, use, and display of the Recommendation Page and as examples of best practices in our educational and marketing materials; provided however, that Amazon will not alter any Local Associate Marks from the form provided by you (except to re-format or re-size within the Recommendation Page, so long as the relative presentation of the Local Associate Marks remains the same).
Hello, Steven. Nice article. You have hit the nail on the head. I too believe that both old and new marketing needs to compliment each other to get the desired result. I feel that with data from new marketing solution like social media shall be added to old tools like email marketing and direct mailers to make them more efficient and bring real business value. Thanks for highlighting the points.
Every week, the folks at InVision send a roundup of their best blog content, their favorite design links from the week, and a new opportunity to win a free t-shirt. (Seriously. They give away a new design every week.) They also sometimes have fun survey questions where they crowdsource for their blog. This week's, for example, asked subscribers what they would do if the internet didn't exist.
You might think that super affiliates would not want to help each other, but this is not the case. In fact, super affiliates become super affiliates because they help each other. Jim and Sue will sell Bob’s e-book. Next month Bob and Jim will promote Sue’s software tool. The month after that Bob and Sue will peddle memberships in Jim’s online community. Go through the archives of different super affiliates’ blogs and sign-up for their email newsletters. Watch for who they sell for. Then, follow those people. Soon you will uncover the pattern of cooperation for yourself. Notice too that super affiliate clans tend to share an industry or niche. This ensures that no matter whose product or service they are selling, they will always be selling something that can interest their audience.
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