I think stack still needs to deliver on the promises and the products that were promised during the ico or may be the project team is intentionally delaying development due to bad market conditions, i know stk is lacking volume and value in the market but that can be improved only by providing real solid products as promised.
at least they need to show progress by releasing a feature or allow the app to be tested by the users, this will be a step forward and probably it will increase the volume in exchanges