When you talk about the need and requirement of wiki pages by not just companies and brands but also individuals then you should understand that wikis are beneficial for individuals as well. If you know how to create a Wikipedia biography for your-self then you can easily create a good reputation for your-self in the market and increase your fan base. Just like brands can benefit from wikis, individuals can also benefit from them and the use of wikis can increase the overall reach for them. In what other ways can wikis be helpful for individuals?