A subscription is a monthly donation you can pay to show your support for the streamer. These payments need to be made on a monthly basis, but can be canceled at any time. Subscriptions are usually disable, which means that the streamer has to activate subscriptions in order to receive donations. This can be done in the settings under Finances → Subscriptions → Enable subscriptions.
We don't have any requirements for activating subscriptions, which is why your fans/followers can subscribe to your channel at the very start of your live streaming experience!
How can I subscribe to a channel?
Check the streamer‘s channel first and click on the "Follow" button. If a streamer has enabled subscriptions, the "Subscription" button will appear right after you clicked on the follow button. You will be led to the subscription page once you clicked on "Subscribe".