Invite a friend to Google Voice
(Cross-posted from the Google Voice Blog) — Since the debut of Google Voice, our early users have shared lots of feedback that has led to some exciting new features, like the ability to receive SMS messages via email and the option to change your Google Voice number.
Context & Ripple Effects
Google Voice has been invite-only since its debut, with early users feeding feature requests back into the product — SMS-to-email forwarding and number changes among them. The service got a mobility push in July when Google shipped mobile apps for Blackberry and Android.
Today's move hands the invite process to those early users themselves: instead of waiting on Google to mint invitations, existing account holders can pull friends in directly, turning the waitlist into a word-of-mouth channel while keeping signup volume under Google's control.
First-order effects
- Early adopters gain a scarce social currency — invites they can distribute — while Google offloads invitation management to its user base without opening general registration.
Second-order effects
- Every accepted invite moves another caller's number and SMS onto Google's infrastructure, deepening dependence on a single Google-issued number and raising the cost of leaving.
Third-order effects
- If the pattern holds, invite gates become the standard launch mechanism for consumer communications services from large platforms — throttling scale and manufacturing demand simultaneously rather than growing as fast as servers allow.
The trend: Consumer web services are using invitation-only access as both a capacity throttle and an engineered scarcity engine, with the user base itself doing the recruiting.