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Library/App & software/Dropbox’s two-sided referral rewards/Certificate

Spread Certificate · No. HIS-01075

Drew Houston’s 2010 slide explaining Dropbox’s two-sided referral incentive

This certifies how far it spread

Dropbox’s two-sided referral rewards

Dropbox ·September 2008 ·seeded onOpen web

Spread Score

40

Notable

Verified independently

Verified

Apr 2010

Milestone date, Sep 11 ’08 to Apr 2010

Verified

1 platform

Started on Open web

Claimed, not audited

Claimed

2.8M

Direct referral invitations, trailing 30 days in April 2010

Per Drew Houston

Claimed

60%

Reported signup lift from two-sided referrals

Per Drew Houston

Claimed

35%

Daily signups attributed to referral program

Per Drew Houston

Issued Oct 17, 2026 · Spread Score v1.2 provisional · 6 sources

howitspread.com/id/HIS-01075

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