There is some benefit in posting on channels- -Lots of heart tips -Gain Subscribers Own Timeline- No extra benefits. Those who join as new ones need subscribers, in which case posting on the channel would be a wise thing to do. But it is very difficult to get a tip on the channel in the new update. That's why everyone is using their timeline now. However, in this case, only the newcomers are facing difficulties. I would say if you want to increase subscriptions then there is no exception to communicating with others in their posts with better opinions. Chamber can be used for tips with lots of heart. :) There are no exceptions without writing quality content and engaging with others.