I have seen some guys talk about submiting articles to WIKI, such as en.wikipedia.org, www.mediawiki.org. is it good or bad? someone side it's good for PR, but I checked kiwi, it's NOFOLLOW, so I don't think it can help with PR. and if I submit my articles to KIWI, when user search the keywords, GG bring them to KIWI, not my site, and GG may even think KIWI is the author of these articles, because they have PR 9. I submited one article to en.wikipedia.org, that only brings a few visitors to my site. but I dont know how many visitors they took from my site...anyone can tell me it's good or bad thing to do so?
yep, you don´t get any advantage related to SEO. Visits only (i´me earning them, and i didn´t spam it. Just added some websites including mine in one wiki page )