Technique · Influence
Referral page that names the referrer
After a positive moment, ask "Who else would benefit?", then send each invitee to a page that names and shows the referrer ("Ana uses this for her client reports and thought you might too") and gives them something useful. A friend's name opens the door; contact harvesting and invites sent without consent close it.
Plain label: invite page from a named friendAlso known as: endless chain, personalized invite, referral landing page, invited by a friend
How it works
Mentioning a mutual friend transfers some of the liking for that friend to the request, so a referral arrives partly sold. Personal invite pages keep the friend visible at every step. The pull disappears, and turns into resentment, when the referral is extracted through address-book uploads, invites sent in the user's name or reminder spam, which also carry legal risk.
In the book. The endless chain: each customer names friends, and each friend is approached in the referrer's name (Ch.5, p.128). INF-T-LK-02 (Influence Ch.5, p.128)
In a product [S]. Invite pages that keep the referrer visible and give the invitee value, with invites the user sends personally.
Evidence Evidence grade C. Limited evidence: few or small studies.. The value of referrals is well documented; the named-referrer page itself has little published testing.
Evidence warning
Bulk contact import without clear consent has led to legal settlements (CASE-M03); send only the invites the user explicitly chooses.
What the research says
A household-products company trained sellers to ask each customer for friends' names and to open every call with the referrer's name; its manual claimed a referral was about half a sale (practitioner claim).
Influence Ch.5, p.128
A file-sharing service that gave free storage to both the referrer and the friend reportedly raised sign-ups by about 60% (secondary sources only).
CASE-M15, 2010
How to build it
- Web
- After a milestone, ask "Who else would benefit?"; each invite links to a page with the referrer's name and photo, a line on how they use the product and a gift for the invitee.
- Mobile
- Let users share an invite through their own messaging app with a pre-written, editable message; never upload the address book.
- B2B
- Give champions a share kit (a short note, a one-page summary) that comes from them, not from the vendor.
What can go wrong
- Address-book uploads and invites sent automatically.
- Reminder chains to people who did not respond.
- Referral rewards so large they attract low-fit users.
Pairs well with
- Pairs with HK-TRG08: invites that carry value to the invitee.
- Pairs with in-t-lk-21: ask after a success.
- Pairs with in-t-cc-23: keep referral rewards modest.
In practice
Where it shows up
Dropbox · 2010
Dropbox: a referral reward that is the product
Sign-ups reportedly about 60% higher with two-sided storage rewards, and about 2.8M referral invites in one month of 2010 (secondary sources; grade D). Retellings disagree on the endpoints, so avoid the “3,900% in 15 months” headline.
M3 ×SpreadCase grade for the number: D. Evidence grade for the mechanism link: D.AnecdoteLinkedIn · 2015
RoundLinkedIn: invitations sent in your name
Perkins v. LinkedIn: a $13M settlement announced in Oct 2015 (final approval in Feb 2016) for Add Connections users from Sept 2011 to Oct 2014. The suit alleged members agreed to the first invitation but not the two reminder emails. LinkedIn denied wrongdoing.
M3 ×SpreadCase grade for the number: A. Evidence grade for the mechanism link: C.
Limits
What we don’t claim
- Left Brain and Right Brain are a metaphor for extrinsic and intrinsic motivation, not a claim about neuroscience.Actionable Gamification Ch.13, pp.342-343
Sources
Influence · Robert Cialdini
Ch.5, p.128
Source IDs: INF-T-LK-02
Book content is paraphrased, never quoted at length. Last verified October 24, 2026.
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