The guide has been solely adapted to the new grand exchange and wilderness update. It hasn't been long since the new update and so I don't expect to find my guide anywhere in the free section. Would any of you consider verifying it and possibly posting it in the verified section if it seems worthy?
Also, sometimes free things that are good are still hard to find due to the mass amount of information on the web. Collecting all the good stuff and putting it together is apparently worth the money to a customer even if he/she knows it's free to get because finding that information is hard.
Similarly as to why people buy runescape gold - it takes up time otherwise. Buying it is easier than making it yourself but they both produce the same result, 1 million gp.