Just something to consider, we sell music through CD's and digitally. From my perspective, if I'm considering going to see or am playing with another band I will always take the opportunity to check them out online beforehand if possible. 1 because you then know what to expect and 2 they may be great. I find that having the opportunity to do that will vastly improve the chances of me watching that band and also increase the chances that I will go on to buy their merchandise, be that CD or T-Shirt.
Personally, I find it hard to get into most bands if I don't know their material, listening online gets me interested in new stuff.