Опишите referral Dropbox как кейс growth

Dropbox referral program is a classic example of a successful growth hack.

The idea was to motivate users to invite friends by offering bonus disk space for both the inviter and the invitee. This created a viral effect: each new user could get additional space by inviting others.

Key points:

• User motivation: free increase in storage limit — a valuable and understandable reward.
• Viral growth: users became channels for attracting new customers.
• Ease of use: invitations were sent via email and social networks, reducing barriers to sharing.

As a result, Dropbox significantly accelerated its user base growth, reduced marketing costs, and strengthened customer loyalty through a useful bonus.