The Sablier protocol (https://sablier.finance/) trustlessly streams crypto/stablecoins on a second/hourly/daily/monthly basis which covers use cases such as subscriptions.
No, that doesn't address the use case for subscriptions. (In fact, I'm struggling to understand why anyone would use it in its current state.) The sender of a Sablier "stream" has to set a fixed start and end time for the stream, and deposit the entire value of the stream up front. None of this makes any sense for a subscription application, where the merchant wants the subscription to recur until cancelled, and the subscriber doesn't want to make a large payment up front.
