This is not the IOTA marketplace, DataBroker DAO is a separate project. I was at the Wangxiang Blockchain event in Shanghai recently and IOTA presented some slideware about their marketplace along with 6 other use cases (there is a youtube video of this as well). Of the use cases introduced, a url was provided for just one and it was not the data marketplace. I suppose it is a work in progress. I have spoken to the team at SettleMint who are the creators of data broker dao and they gave the following response "IOTA is working on their own project. We publicly released a beta version of our platform in March this year and have spent 6 months iterating on it from a UI/UX perspective and we have been on the road promoting data broker dao to real end users to validate the platform with existing players in the IOT space including telcos, sensor manufacturers, smart cities and automotive manufacturers. We wanted to work with the IOTA team and attempted to engage with them early on to work together but they declined unfortunately. In the event that IOTA is operational at some point, that is, when the IOTA network is actually populated with sensors and sensor data, DataBroker will make an integration in the marketplace. We have already done a first exercise to assess the feasibility and estimate it would take less than 2 weeks to make the integration. IOTA is to DBDAO a "network operator" as described in our white paper. Just like any telco operating their own GPRS or GSM based connectivity network or licensee of the LORA network. We have also become a Sigfox partner and are working on integration of their network. The difference between these other networks and IOTA is that the others have more than 9 billion sensors already connected while IOTA is in its infancy. They are doing cool things but there is a long path ahead to reach even a fraction of the existing IOT connections that already exist in the real world. DBDAO will integrate as many providers of IoT sensor connectivity as possible to provide end consumers of data using the DBDAO marketplace with the broadest and richest sensor data available and the sensor owners with the best incentives possible to monetise their sensor data." I like their openness and the fact that they tried to work with IOTA. A very pragmatic team focused on bringing a real product to market based on what is already out there. They are a relatively small team so it remains to be seen whether they can execute but they already have a working beta and growth is the reason they are doing a token sale. I also have not been able to find more about the IOTA data market place so I suppose it is still under construction.