One site sells quizzes (export to zip) - buying sites install quizzes.
I have a site using JoomlaQuizDeluxe with +80 quizzes. A customer can select / purchase a quiz. The quiz is then downloaded in a zip format. The quiz can then be uploaded / imported to another site with JoomlaQuizDeluxe installed.
It created many more license sales for JQD.
Problem JQD is no longer updating the code and is not planning to be Joomla 4.x compatible.
An opportunity for CommunityQuiz???
I think so...
;)