Interaction design is hard enough to do when the business model is
clear. When the designer knows exactly how making a better design will
increase the value of the company, (thereby increasing the chances
they'll get a raise if they do a good job,) it's still hard to know
what to do.
All one has to do is look to Apple to see how this works. When iTunes
6.0 came out in January of 2006, they introduced a feature called the
mini-store, which, for all practical purposes, bombed.