Amazingly short-sighted decision making. A service like ninite, (whether the free or the paid version) is simply helping to spread the use of your program, and therefore your brand-name because the people who use ninite can get the program on their (Or their customer's) computer quickly and easliy, without having to go to several websites when they're getting a system configured for use.
I can't help but think that Piriform's decision on this is just Dumb - Dumb - Dumb...but that's just my opinion )