In section 4 (Creating an Online Course), the author links to her other article[1] about creating a WordPress membership site using plugins but specifically states these are free registrations that do not handle payments. I wish the author did explore payments more because there are WordPress plugins[2] that do provide subscription payment and reoccurring billing services integrated with payment gateways that truly allow a CMS to be monetized. The issue I see is that WordPress is the only CMS platform that offers such easy membership, payment and content restriction integrations. Have others seen this kind of functionality in other CMS platforms?

[1] https://www.codeinwp.com/blog/build-a-membership-site-on-wor...

[2] https://www.paidmembershipspro.com, https://docs.restrictcontentpro.com/article/1593-restricting...