Ours was that initially we couldn't give it away. The first couple merchants would only agree to use the service if we gave it to them for free and did all the

Ours was that initially we couldn't give it away. The first couple merchants would only agree to use the service if we gave it to them for free and did all the work of building their stores ourselves. There was also the fact that many of our most successful merchants were selling something dubious. But I wouldn't call it a secret because we didn't know it ourselves. We had no idea why the stores selling Japanese comics or "dietary supplements" did so well.