You also need an ability to send manual email (via Manual Workflow) to the customer who have Opted-In to get them. Right now, I do not see an easy way to do this.
IMHO – This is a critical piece missing from this plugin because without it I see Opt-In list as essentially useless for now (since there is no way for me to Export Opt-In List.
Yes, exactly. "Order includes Product from Taxonomy term" line should be added to rules.
You also need an ability to send manual email (via Manual Workflow) to the customer who have Opted-In to get them. Right now, I do not see an easy way to do this.
IMHO – This is a critical piece missing from this plugin because without it I see Opt-In list as essentially useless for now (since there is no way for me to Export Opt-In List.