1/3rd of this movie was financed by fans buying the movie in advance of production!
A lot of the lines that Carmilla says in Laura's dreams are actually quotes from the original novella.
Laura's reportage during the credits about the drinkable fountain of youth in Iceland is meant to imply how the couple bypassed the obstacle of Laura growing old while Carmilla didn't.
Fans of the movie and original web series are most commonly known as "creampuffs," a nickname used in the first season and referenced later and in the movie.
Elle Sheridan is supposed to be the original "Laura" from the novella.