I don't know if to call it a guide or not, but it's very intersting site to learn how to create a landing page for your prodcuts I would say you can take from it not only to sale digital prodcuts but for all affiliate marketing
I also find it funny
here's the site
Writing effective sales copy to increase your sales
So, how do you like it?
I also find it funny
here's the site
Writing effective sales copy to increase your sales
So, how do you like it?