<https://www.subscriptioninsider.com/article-type/subscriber-only/customer-retention-2020#article>
<http://schema.org/author>
<https://www.subscriptioninsider.com/#/schema/person/a65c0ea5e8ce8a5ad0dbac5b5dd24dcf>
<https://www.subscriptioninsider.com/article-type/subscriber-only/customer-retention-2020>