When they have answered a question (probably that you asked) and given you all the information you were looking for.
It is very informative with the right people and people with trust points. But, try not to fully trust people with no accounts.
Trust points do not entirely help you get hired to work for WikiAnswers, since actually getting paid to work for WikiAnswers is different from the amount of trust points you received online.
You can get trust points on WikiAnswers by making many helpful edits and doing your best to make WikiAnswers a great Q&A site. When people see an answer you posted on a question, they have the option to "Recommend" you. When they do this, you receive a trust point.To earn trust point you have to answer questions. If the asker thinks your answer is good they will give you a trust point. Not all askers give trust points though. Good luck and keep answering!
Your total WikiAnswers contribution points are calculated as the sum of all of the contribution points you have earned. These include first answers, edits, organizational actions, questions asked, and community contributions. All of these points come under the heading of "Contributions" in your WikiAnswers profile. Trust points are slightly different. Contributors do not directly earn these points through their contributions; they are awarded trust points by other WikiAnswers users. Therefore, trust points are not counted as contributions, and do not add to the contribution points total in a WikiAnswers profile.
There is no limit as to how many trust points a person can earn on WikiAnswers. Currently, the highest number of trust points held by a person on this site is well over 8,000.
The numbers beside the usernames are Trust Points. Trust Points are points given by other contributors who think a contributor has done an outstanding job on WikiAnswers. The amount of points is the amount of people who trust you and your contributions. There should be a 'recommend' button by your name if you made the last edit in an answer. You can recommend yourself once. To advance your Trust Points, just make high-quality answers and/or contributions to WikiAnswers and someone is bound to trust you.
Many have.
Currently, the WikiAnswers system of trust points hasn't changed - you can only add trust points, and you can only recommend from a question the user has answered by going to the contributors tab and clicking "recommend".
No, you are not able to hide your trust points from other users.
No, neither giving nor receiving trust points count as contributions.
Actually nothing. Trust points are just an indicator of how trustworthy your contributions are. If someone feels your answer was good, he might recommend you, which would increase your trust by 1 point.Other perceptions of Trust Points:Most people like to have their efforts acknowledged, and I suppose that getting trust points motivates them to contribute more to WikiAnswers. It's an incentive scheme that adds to the quality of the site.
There is no maximum amount of trust points one can have on WikiAnswers. At present, the highest amount so far is well over 8,000.(For a list of users with the most trust points, see the Related question)