Email Marketing Features

I know that subscribers get messages when a comic updates, but what if we could improve on this?

Similar to how Gumroad has an email wizard tool, it would be nice to be able to send your own emails - so that you can cross-market ongoings with your series - such as external/physical copy announcements/deals, promote social engagement, and share deeper interactive details with fans.

Features that would be nice: 
-Customized Email Coding and Launching when desired
-Include the "Similar To" section in email alerts to further promote GC interaction/discovery
-Download subscriber list 
-Sharable Genre interest lists between fantasy/webcomic/manga/action/ect creators (maybe a lotto or limited sending privilege per mo) 

Creator Value: 
-Freedom of design and customizations 
-Keeping engagement and top of mind in between chapters (can be limit capped to 1/mo to discourage spamming) 
-Cross Market to creator's needs (crowdfunding announce/physical copies/social share/ect)