1) Gain an idea/keep in touch of what is happening in Internet Marketing scene (strategies, product, news).
2) Help others as well as yourself to solve a 'how to' problem whenever it crops up. This applies to universal law of "Give before you can receive".
3) Promote your product or other products with your affiliate links when you recommend solutions.
4) Create a sense of trust and bonding among fellow marketers in which real friendship can be establish over time (a sense of belonging).
5) Share and learn from others through a mutual exchange of experience.