#224 1999 · PayPal · Financial technologypiggyback
PayPal couldn't get eBay to officially support it, so it built a robot that bought things on eBay and demanded to pay with PayPal
the problem
A payment method only spreads if buyers already use it, but buyers only adopt it if sellers already accept it
background
In 1999, eBay was the obvious place for a peer-to-peer payment startup to find users, because eBay auctions were exactly the kind of stranger-to-stranger transaction that needed a payment method neither party had to trust the other for. But eBay had no official relationship with PayPal and no reason to promote a third-party payment tool, and PayPal faced the standard two-sided cold-start problem in its sharpest form: eBay sellers wouldn't bother offering PayPal as a payment option until enough buyers were asking for it, and buyers wouldn't sign up for PayPal until sellers were already accepting it.
The standard fix for a marketplace cold start — advertise to build awareness on both sides simultaneously — is slow and expensive, and PayPal had no leverage to make eBay itself endorse or integrate the service. PayPal needed sellers to feel demand for PayPal that hadn't organically arrived yet.
the move
PayPal's team built an automated script that crawled live eBay auctions, emailed sellers directly asking them to accept PayPal, and then placed real bids on their listings insisting on paying with PayPal — winning some of those auctions and actually paying for the items, which were later given to charity. Sellers who received a real bid conditioned on accepting PayPal experienced concrete, immediate demand for the service, not a hypothetical pitch, and started offering PayPal as an option so as not to lose out on buyers.
the payoff
PayPal ended 1999 with fewer than 10,000 users, passed 100,000 by the end of January 2000, crossed 1 million within a few months after that, and reached roughly 5 million users by that summer — a trajectory PayPal's own early leadership and later industry retrospectives describe as driven primarily by an embeddable payment button for sellers and a $10-per-referral cash incentive, with the eBay auction-bidding bot serving as an early, narrower tactic that seeded real seller adoption before those larger mechanisms scaled.
what came after
The eBay bot is retold in Eric Jackson's book 'The PayPal Wars' and cited across growth-marketing literature as an early example of a two-sided platform manufacturing real demand on one side of a marketplace to unstick a cold start, a tactic since echoed by other platforms (Reddit's founders posting under invented usernames is a close cousin) that needed to look and function as though critical mass already existed before it actually did.
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references
- [1]PayPal's Robot ArmyStrategy Breakdowns, 2023strategybreakdowns.com
- [2]The Sharp Startup: When PayPal Found Product-Market FitCraft Ventures (Medium), 2020medium.com