...more for the purpose of sharing their observations and knowledge with people who might be helped by them, or for the purpose of self aggrandizing themselves ?

I see a great deal of the later and some of the former, but which do you think is more prevalent here?

Recently someone posted a "question" of whether they should or shouldn't be proud of reaching 100 "best answers." Obviously this was a thinly veiled attempt to embroider their own efforts with the praise and allocades of others.
Is yahoo answers more a platform where narcissists can momentarily satiate their hungry egos through self-golification and acclaim from others,or a place where individuals can aid people in gaining insights and information to solve their own quandaries ?