I am not going to participate in the actual discussion, but I have broken down Javaness' original post and attempted to guess the discussion he wanted to have and added some clarifying questions. Consider this a meta-discussion post.
Javaness2 wrote:A long time ago now, I believe I asked how to increase the number of women playing Go.
Javaness wants to know how to increase the number of women playing igo.
Javaness2 wrote:...snip...Women, most of us would agree, can be put off by walking into a club/tournament to see that there are 0 other women there. Since women are not a minority in the population, this is not obviously a natural state of affairs.
Javaness' implicit assumption: It is unnatural for non-minorities in the general population to be minorities in the population of those who engage in (perhaps non-physical) particular recreational activities such as playing igo.
Javaness2 wrote:...snip...What is the best way to positively discriminate?
Question: What is your definition of positive discrimination? Perhaps not explicitly and precisely defining what you mean by positive discrimination has led to a number of replies that you believe to be irrelevant to your original question.
Question: Would you be okay with the follow definition of "positive discrimination for women in igo"?
Potential Definition (Positive discrimination for women in igo): Any program or policy granting benefits exclusively to women players with the goal of increasing their number?
Javaness2 wrote:Some may still come back with a straight
"No. Positive discrimination is never right." 
Question: Does the morality and effectiveness of "positive discrimination" as you mean it belong in this thread or in a new one?
Question: Can the main question being asked by Javaness be restated as follows? "Ignoring personal value judgments about the right and wrong of positive discrimination, which of the many methods of positive discrimination would do the best job of increasing the number of women players when evaluated on the dimensions of quantity (how many women?), speed (how quickly?), and monetary costs (how much $$$s?)?"
Javaness2 wrote:To retain youth players, who are often classed as the future, we generally pamper with them with attention. Youth Championships. Youth prizes within tournaments. Teaching for kids. etc
Veterans are given special championship tournaments too sometimes. I have never seen a section prize for Veterans though. Weaker players, arbitrarily divided into some boundary by kyu or dan level, are given such prizes.
Veterans tend to spend more money on the game than others. This tends to have a trickle-down benefit for all players. Young players are future consumers in the "igo economy". In the absence of young players, the "igo economy" may decide to produce less books, lectures, and other igo content by forecasting future profits. If the igo-playing population is projected to grow, all players reap the benefits in the form of increased content availability and lower prices.
Question: Would you like to argue that a similar halo effect will ensue if more women start playing igo? Or is that discussion deserving of a separate thread?
Javaness2 wrote:These 3 categories are never considered to be positive discrimination, at least I have not seen an example of anyone publicly classing them as such.
Perhaps "discrimination" is not the word you want to use? You may have invited unwanted controversy by using that term. After all, no one said that the money for these programs had to come from public funds or the coffers of the AGA/BGA/EGF. Private sponsors could be found.
Question: What about using the term "incentive programs" instead?
Javaness2 wrote:...snip...[paraphrased: 1) women-only tournaments, 2) pair go, 3) women-only training sessions]...snip...Which of these 3 paths do you see as the best approach to try? Do you see it being genuinely tried as well? (For instance, is Pair Go in your country simply a charade to allow participation in a luxurious international event, or is it actually actively used for promotion.)
Javaness has given three examples of "positive discrimination" programs and asked which of the three would be most effective in increasing the number of women who play igo.