Ok so maybe every one is not as efficient as you are. But based on the national Christmas Tree Association over the past 5 years their have been on average 25,000,000 live trees sold in the US. If I sell to just 1%, well you do the math.
I've always taken the stance "nothing ventured nothing gained". Or you could think about this way, there were other 3D programs on the market when Martin started Hash, he just had his vision of how it should be made. The WaterPixie is my vision on the most practical and aesthetically pleasing way to water your christmas tree.
One other point I'd like to make is my target audience is women as opposed to men.