People tried to clone Bingo Card Creator because you meticulously documented it being capable of bringing in small profits, and because there are some particularly lazy and stupid people out there -- the type who would post a want ad to "Create a clone of bingocardcreator.com." They read your popular blog, and in their stupidity thought they could use it as a recipe to make $X/year. I agree that they represent some form of competition, but that it is the weakest kind imaginable. Like you said, BCC succeeded on the back of "health/focus/energy level/ability to continue executing on the businesses." Without those things it scarcely could've turned any profit, let alone year after year, which is what makes your story so compelling. But I'm not sure it's a useful lesson about the supposed small threat of competition.