Very perceptive Scott. I guess I was really thinking of how a strict two-sided marketplace was different from the others. You are absolutely right that there are many models available here. For example, in the case of Yelp, the buyer (the party adding money into the marketplace) is also the supplier. A business that takes charge of their page on Yelp then advertises to reach more consumers. And because Yelp is not part of the transaction ‘close’, and thus not part of the payment flow, this model had to come out of necessity and not because of design. For social networks like Facebook, there is cross-over between supplier and consumer, but the buyer tends to be largely independent adding value to monetize attention through ads. I don’t have details yet, but I think that these kind of networks need to be really massive to be successful.