Something else to consider:
To my knowledge, in westernized, industrial culture there is no culture or ritual or tradition of Penis Enlargement. Matter of fact, an overwhelming majority of physicians world wide still propagate that the only way to enlarge the penis is by surgery, despite the fact that they give
weights or stretchers to compliment the surgery (which they rarely discuss except for with the people who have actually asked the surgeons). Plus, this type of culture is still relatively shy about such topics so it is not something discussed in public too much. So, in such culture the only people to even consider Penis Enlargement are MOST LIKELY to stumble on it online. I suspect that MOST people don't even initially (or ever) fathom that Penis Enlargment can be done in any other way than surgery until somebody breaks that paradigm for them by accident by them stumbling onto the info through the internet or very rare discussion ... so in most cases only by the internet hence the need to consider the total number of internet users world wide. I'd venture to say that there is likely more men on the net than women considering various reasons from adult entertainment, to lifestyle habits, to some things that would be considered sexist like men tending to operate such machinery more than women and the like. But, to be generous we'll say it's 50/50 on the net, for a total of around 509 Million men on the web circa 2005 while keeping in mind what is likely still exponential growth in internet usage though I suspect there will be some slower periods rather than straight hike depending on time frame analized, of course.
So, of 509 Million men on the net, with still so many not being aware of the possibility of Penis Enlargement other than through surgery which many can't afford or refuse to consider for other reasons ... and MANY browse the net while at work or are on the web for work exclusively or are just playing games, watching viral videos etc .... Penis Enlargement is still in it's infancy.
**** ACTUALLY, I'll edit this in out of rememberance for internet censoring. Countries like Iran, China and I suspect MANYothers censor the internet quite aggressively. They detect things like adult entertainment or any word that may be related, like Penis ... and they totally deny access citing religious or political law.
SO, the number is even less. 509 Million men on the net DO NOT have access to this type of info due to censoring. So, you have MUCH LESS than 500 Million who have access to even the word Penis, let alone a site filled with pictures and discussions of all sorts of sexual nature that are found in the Penis Enlargement community.
***********
You have 100k registered members and usually only around 500 active on the forum. You are pretty much the most popular in Penis Enlargement. Let's be generous and say there are 10 more sites like yours out there and then we'd be saying that 1 million people knew about or are involved with Penis Enlargement.
So, maybe it is realistic to say that only around 1 Million people know MAX on the net and I stress max with the probablility of a very noticeable amount less. However, I think the potential has no limit and if we are all still around in 10 years with no nukular (Bushism) warfare or something of mass eradication .... then awareness may reach 100 Million from net browsing by that point.
THEN, if you want to know about TOTAL number of people even off the internet then I'd look into which tribes (likely to be called this and out of the industrial world) still carry on Penis Enlargement as tradition and what their populations are and add that to my internet guess.
and how often they do practice it?