We present you a banner, which is a really good example of a two-way communication channel. This banner brings real value to the customers in the form of free advertising space. Nissan car brand wanted to promote their new Micra as a space saving car, which is so small, that only takes a little part of the banner and leaves the rest to the viewers. In return, anyone could use the rest of the space to sell their used cars.
They even made sure to buy loads of premium banner spaces across the internet. This clever idea has been developed by a TBWA/RAAD agency in Dubai.
Have a look at a nice case study video they put together: