Yes but they are one of the only (if not the only in many cases) companies that does so, and from what I've heard from their founder - that's why Sparkfun was made - to make electronics more accessible. I agree some of their stuff is overpriced when compared to the same items' prices at digikey or some other hobby e-store, but the circuit designs they sell are special not because they came up with them (your right in saying most are from the datasheets), but because they sell them pre-made to the public.