In addition to displaying sign up forms on their websites, many businesses also choose to purchase email addresses from email vendors.
Purchasing email lists can speed up your marketing campaigns and help you get ahead of the competition.
Ninja Emails is a popular email vendor that sells data from across the globe. They have over 17 million email addresses in their portfolio.
In addition to providing data, Ninja Emails also provide an email marketing delivery service. They will send the emails for you and then provide reports on that data.