Blackjack is a staple at any casino, and it’s a game in which skill and luck both play equal parts. Skill and a little bit of luck are needed in email marketing, too. For example, why take a chance on your email address collection process when you can improve your own odds by using a double opt-in sign up method whenever you can? See what I did there…cards and contacts? Tricky!
Seriously, though: The definition of doubling down is “to become more tenacious, zealous, or resolute in a position or undertaking”. And this is how everyone should approach email address collection. Why?
Email Marketing Blog 