Because that's the whole purpose of the site !... People post questions they want answers to - and the millions of Wiki users around the globe choose whether to answer or not.
There are so many questions on WikiAnswers that it is impossible to total exactly how many questions there are. Even now, questions are being asked, so the total will always keep changing.
WikiAnswers can hold an infinite amount of questions. This is the Internet, it's so big there aren't limitations.
To get a good answer.
WikiAnswers has so many members because Wikianswers is a great site to ask your questions and get them answered [by real people], or answer a question yourself. So, why not join the WikiAnswers Community today?
Yes and no. Questions on WikiAnswers are answered by members of the WikiAnswers Community. There are not people sitting in an office answering the questions asked. However, there are many professionals who answer questions on WikiAnswers. Many of the supervisors are professionals in the category they supervise. So you are very liekly to get a good professional answer to your question.
Not everyone knows the answer for something.
There are a lot of questions to be answered and only so many contributors.
There are over 600 questions about Michelangelo on WikiAnswers.
There are over 224,500 questions about celebrities on WikiAnswers.
There are over 1,000 athlete questions on WikiAnswers.
There are over 6,500 questions about authors on WikiAnswers.
There are over 6,500 questions about poets on WikiAnswers.