If you observe the graphic above, you can see how the inner workings of the marketplace. On the left side is the Data being published to the marketplace. The Property Data lives on the Door Chain (private Blockchain where Data on Properties is registered and verified). On the right side is the Advertiser who has already configured their account to notify them of any new data published on the Door Chain that matches their specification (Feeds). When there is a match, the transaction is executed, and DOOR is transferred from the Advertisers Balance to the Property Owners Balance. At the same time, the Property Data is shared with the Advertiser.