Gimmicks to search followers

I recently seen a video about Jennifer mentioning to not use gimmicks to attract people. What would be examples of gimmicks. Allow me to elaborate, im writing a book and have a fan page, I'm trying to attract non believers whom have been in trauma, my method is to gently show im christian without making them flee so I can sell my book and then earn their trust to bring out more about the HIS word and using my book as an example. Would my method be classified as a gimmick? If so, what would you advise? Blessings to you. TY