I want to introduce a file download at the bottom of certain blog posts where, in order to receive that download, someone needs to register their email address, any idea how I do this?
To be clear, only a few blog posts will have this, and depending on which blog post they sign up via, they will receive a different PDF download.
I am happy to do it whereby they request the download via a subscriber form and it then gets automatically emailed to them (by my mailchimp autoresponder).
Essentially it will be just like Backlinko does:
http://backlinko.com/increase-conversions (bottom of this blog post)