By asking and answering questions mainly, but other things also count, like categorizing questions, cleaning things up (editing to make things better), and participating in the community.
You can see the leaderboard where we track contributions here:
wiki.answers.com/Q/Special:Tops
Supervisors review contributions made to the site.
You need to have 100 good contributions on this site.
The Spanish site is not at all competitive.
The historical contributions on this website are not active anymore. They are remnants of the old contributions system. The old system did not divide the types of points like it does now. When the site went to the new system, all the old contributions were made historical. Only members that have been on the site for a while still have those contributions on their profile.
WikiAnswers does not pay for contributions. All contributors and supervisors are volunteers who love the site concept.
No, except work on the site.
Your contributions are listed site-wide, not per category. So you can browse around and contributions will be counted.
Answers.com is the company who runs it, but each contributor is responsible for their own contributions.
It does, but once you actually click "recent site activity", your contributions are probably buried under others. There are many, many contributors on WikiAnswers. In fact, there may be 50-60 changes in a second!
Sadly, there are no Contributor levels or profile badges for reaching 20,000 contributions. However, you do get to boast that you have reached a whopping 20,000 contributions on the best Q&A site on the web! When you reach 25,000 contributions you will become a Gold Contributor, and when you reach 50,000 contributions you will receive a badge on your profile!
THE SITE IS NOT AS DETAILED i THOUGHT IT WOULD BE.
A Wikiholic is somebody who is addicted to this site and makes constant and useful contributions to it. It is a play on the word "alcoholic."