I'm going to guess, since I was really looking for the answer myself. Promotion of other websites either owned by the developer(s) of the forum and/or spammers. Maybe they're one and the same? On occasion?
Purpose two I guess would really be left up to the users.
(Apex) Forums.
Library, internet forums, internet searches
internet forums
There are several Disney forums in internet. Disboards, Magical Kingdoms forums, WDW magic etc are a few examples for Disney forums. Most of them are about Walt Disney World.
They were the first forms of internet level forums: they allow people from many countries to participate in ongoing conversations BUT they don't have to be present when others are for the messages to be passed. They are almost a 'public email.'
To many to count! Thousands upon thousands.
Forums
Avatar is a character that represents the user in the online world for example in videogames or the Internet. On forums, the word avatar is used to speak about the personal picture that users may choose to appear in their profile.
The 'Vintage Erotica' forums has over 400,000 members and is one of the biggest erotica forums on the internet. It allows users to share images and interact with each other.
There are a loads of forums on the Internet that you could join. The recommendation is to look at the ones that best suit your needs.
Forums are mainly internet bases but they can also be found in your community at schools, colleges or universities where computer classes are usually held.
There are many good forums on the internet that discuss Blackberry devices. Some of these forums include blackberryforums, forums.crackberry, and virginusers.