How do channel subscriptions work?
If I subscribe to a channel would I see messages from whoever wrote in that channel?
You would see channel messages within your social network: so those of your friends and friends of friends. You would not see messages from folks outside of your network, even though they may be posting something using the same channel designation.
You would see those messages if you later became friends (which is likely, since you share the same interests!)
- Answer taken from this thread