What I meant was, when is it OK to buy a knockoff, and when is it not? When is a brand so 'big' that it is (apparently) OK to buy knockoff? When/why is it justified? For some people it is a principal thing, they don't buy anything but the original product (like spektrum products), no matter how high the cost. I guess it depends on loyalty to brands, and the size of the wallet of the particular person (consumer) involved.
Also, HK is for example selling "rotor bits", which is kind of a knockoff to the rotor bones from FT. And while Josh/Chad say it's OK with them, deep inside I think they don't like it. I know I wouldn't. Even while FT has free plans online, it does take away profit if people buy knockoff instead of FT products.