We keep requesting this feature. I saw that this was requested at least twice already - with many upvotes too. Please stop dismissing and declining this issue and start listening to us. Obviously we do care about the info whether a first time sub is from a prime sub or paid. So please add the is_prime flag to the Channel Subscribe and Channel Subscription Message Events. Why did you create the Channel Subscribe and Channel Subscription Message Notifications in the first place when you want us to use the Channel Chat Notification in the end? Or do you really expect us to use multiple notifications and match them to get all the info we need for a single subscription? Please, this information is important to us and it belongs to the subscription events. By refering to Channel Chat Notification you are not helping us at all, you are making things complicated for us when the solution could be so easy and seems to be obvious to us. We could be wrong ofc.. but please give us a good explaination then and stop refering us to Channel Chat Notification. It does not feel right at all. Thanks for hearing me out.

Added a seperate one for API - https://twitch.uservoice.com/forums/310213-developers/suggestions/46807591-get-broadcaster-subscriptions-recurring-flag

Adding something similar to helix's subscriptions API would be helpful for tracking recurring sub counts for the new partner plus program

Adding on to what Barry said, I don't recommend using a boolean flag for this. There was a string identifier in pubsub, while I'd like it to just have Prime, Tier1, Tier2, etc, remaining consistent to the platform would be more idealistic, so it'd likely be Prime, 1000, 2000, so on.

First we'd need

https://twitch.uservoice.com/forums/310213-developers/suggestions/42008104-please-provide-an-event-sub-that-emits-sub-notifi

Which would make that distinction