Harry's turned a landing page into a referral machine that built their launch audience before they sold a single product.
Harry's needed a large, ready-to-buy audience the moment they launched, not weeks after. Instead of just collecting emails, they built a page that turned every visitor into a recruiter for more visitors.
A typical landing page asks a visitor to type their email and then does nothing else with them. There's no reason for that visitor to tell anyone else, so growth is capped at however much traffic you can buy or earn directly. Harry's needed signups to multiply on their own, not just accumulate one at a time.
Harry's built a referral page where signing up was just the first step. Each visitor got a personal link and could see themselves unlock better rewards as more friends joined through that link. This gave people a reason to actively share instead of passively signing up and moving on.
The campaign ran for 7 days and produced 100,000 pre-launch signups. Of those, 77% came from referrals rather than direct traffic, meaning the audience was growing itself. Harry's entered launch day with a large list built largely by the people on it, not by the brand alone.
When you give people a visible, rewarding reason to share, they become part of your distribution instead of just an end point of it. Any business collecting signups before a launch can apply the same logic: make sharing pay off, and growth stops depending solely on your own reach.
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