Guests can opt in to email marketing, where can I find those guests?
How to find guests that opted into email marketing
First, you'll head to the reports tab within the backend. You'll then want to set the parameter's and filters of which specific guests you want to find.
Once these parameters are set, click download in the top right
Within this sheet you'll find all the information about the guests found within the parameters set. The column you are looking for is "opt in"
The guests with the "TRUE" field have opted in to email marketing.