No. If you sell books through Amazon, you do not own your customer email list - and Amazon's Terms of Service are explicit about why.
This is one of the most consequential differences between selling on Amazon versus selling through your own Shopify store, and it is one that many new sellers do not fully appreciate until they have built significant sales volume on Amazon and realize they have no direct relationship with any of those buyers.
What Amazon's Terms Actually Say
Amazon's seller policies prohibit using customer information - including email addresses - to contact buyers outside of Amazon's own messaging system. You cannot take a buyer's email address and add them to your newsletter. You cannot send them a promotional discount for your next book release. You cannot follow up with them directly, market to them, or build any kind of ongoing relationship outside of the Amazon platform.
The only communication channel Amazon allows is through their buyer-seller messaging system, and even that is limited in scope and purpose. Any attempt to divert buyer relationships outside of Amazon risks account suspension.
What This Means in Practice
When you make a sale on Amazon, Amazon owns that customer relationship. They know the buyer's purchase history, browsing behavior, and preferences. They will recommend your competitors' books to that same buyer the next day. The customer who just bought from you may never see your name again - they will see Amazon's brand.
You, as the seller, are essentially anonymous. Many buyers on Amazon do not even know or remember the name of the third-party seller they purchased from. They bought from Amazon.
The Shopify Difference
When you sell through your own Shopify store - with or without BooksCloud - every customer who checks out gives you their email address directly. That email address is yours. You can:
- Add them to your newsletter
- Send them personalized book recommendations based on their previous purchase
- Offer early access to new titles or exclusive discounts
- Build a loyalty program that brings them back repeatedly
This is not a minor feature. Email marketing consistently delivers among the highest returns of any marketing channel. Industry estimates suggest a healthy email list generates approximately $1 to $5 per subscriber per month. A list of 1,000 subscribers can drive between $1,000 and $5,000 in monthly revenue - from customers who already trust your store and have bought from you before.
The Long-Term Compounding Effect
The difference in customer ownership does not show up in a single transaction comparison. It compounds over time. Every Amazon sale is a one-time event. Every Shopify sale is the potential beginning of a long-term customer relationship.
A book seller who builds 2,000 subscribers over their first two years on Shopify has an asset they can activate immediately whenever they want - a new title arrives, a seasonal promotion runs, a curated reading list goes live. That audience does not exist for the equivalent Amazon seller who made the same number of sales.
"One of the easiest apps ever to integrate with Shopify. Game changer for anyone who wants to add books to their store." - That sentiment from a BooksCloud user captures something real: the ease of getting started is one part of the value. The other part is what you are building toward - a store and a customer base that is actually yours.
The Bottom Line
Amazon gives you access to their traffic. In exchange, they keep your customers. Shopify requires you to build your own traffic, but in exchange, every customer relationship you build belongs entirely to you. For anyone serious about building a sustainable book business, that trade-off matters enormously.