While WikiAnswers does not encourage participating just for contribution points, a fast way to get them would be to correct the spelling, grammar and wording of questions/answers. You would be very surprised at how quickly they build up!
If that is not your thing, answering questions in an area that you enjoy is not only fun, but does get contribution points!
WikiAnswers ranks your contributions by how many questions, answers, edits and community work you contribute to the WikiAnswers community.
WikiAnswers does not pay for contributions. All contributors and supervisors are volunteers who love the site concept.
You can't
Answer questions.
Its not
Unfortunately there is no way transfer contributions made as an unregistered user to a registered WikiAnswers account.
There is no end to the amount of contributions you can make.
200,000 contributions
Rudiful2 is the top most answerer of Wikianswers based on the number of contributions.
There isn't a 'best user' on wikianswers. There is only those who have lots of contributions.
You can't
No, and nor is it a profitable organization.