Referral links are fine, but they’re rented income. A brand can change the commission, pause the campaign, or reject a sale. Digital products are different. You make the asset once, improve it over time, and sell it again and again. That doesn’t mean it’s “easy money.” The passive part usually comes after the hard part: picking a useful problem, building a product people understand quickly, writing a simple sales page, and slowly improving it based on buyers’ feedback. But ₹3