Anything with a launch date. Or a wish for one.
If people can sign up for it, they can refer friends to it. Four ways founders use Campalio, with the reward ladder that fits each.
SaaS launch
Validate demand before you write the billing code. Publish the hosted page, watch which channels convert with UTM tracking, and hand early access to the people who bring friends.
Mobile app
Fill your TestFlight before the store listing exists. Show the live signup counter for social proof, and let one-tap share buttons for WhatsApp, X and Telegram do the distribution.
E-commerce drop
Limited run? Embed the widget on your shop, let the list decide who gets first dibs, and run a lucky draw so every referrer has a shot even if they only bring one friend.
Local business
Opening a café, a studio, a shop? Put the hosted page on a QR code in the window and reward the neighbours who bring the block. No website required.