Marketing doesn't stop when you've acquired a customer; most new signups will look at your product once and never come back if they don't see value in it. To treat existing customers as well as prospective ones, focus on "product education" through marketing, writing core concepts down before creating polished content, giving customers the white-glove treatment with live demos, onboarding screencasts, activation webinars, and ensuring all content is crafted to sell, educate, and retain users after the sale.