As said your money is on your list.
Here are a few ways you can use to build that list that makes you money
✔️ Create short valuable pieces of content that are a solution to one of the problems the customer is facing and then market
But while marketing does not just distribute the content in one form like just blog or just E-book, instead repurpose into various forms from E-books to whitepapers to videos
✔️ Add pop-ups to your website and offer something for free in return for their email address
Do not include multiple fields to fill when signing up, just include name and email.
✔️ Provide exclusive offers (10% off) to people who share their email address while they are guests to the site (Not a member)
Whenever collecting email it is recommended that you send a verification email whenever a new subscriber joins the list so that they do not provide their dead email instead provide an active email account
✔️ On your, upsell pages include offers in exchange for their email address
Flat 10% Off in exchange for sharing email
What are other awesome ways you collect email addresses?