well assumming each one of us bought only BlitzPlus thats $574,140. That's $114,828 a year.
That's a very poor assumption considering Blitz3D is the flagship product and that BlitzPlus was really just a side project/experiement with GUI that people complained about endlessly ... or in other words the poorest selling Blitz product. You've got to think the average Blitz user spends at least $100 on Blitz products. I have B3D and Max ... $180 for me. How many have B3D, Max, and BlitzPlus, and BlitzBASIC? Your figure is very modest and probably about only 2/3 - 1/2 of what BRL has cleared.