I think you'll find....
that most techology firms fail to start with a business plan. That's thing they teach you to write at business school which shows where all the costs and revenue are going to come from/to and how you get to a profitable position. It includes identifying all the things that need to be done like, market research, marketing, logistics, etc.
A business model is what architects produce whenever they are asked to design a new supermarket. They make them out of cardboard
Most people set up web sites or more relevantly web businesses on the basis that creating a web site is relatively easy and 9 times out of 10 they are copying someone else's idea. (remember when there were lots of rivals to eBay?) but haven't done the background work that actually led to the idea in the first place.
Smiley because I agree that most internet gold rushes are doomed to failure for all but one dominant player.