https://techcrunch.com/2021/05/28/twitter-blue-a-3-monthly-subscription-service-could-be-coming-soon/

Great news for typo-prone tweeters: Twitter Blue, a $2.99 monthly subscription, appears to be coming soon to a Timeline near you.

Two weeks ago, researcher Jane Manchun Wong first reported that Twitter’s new subscription service is in the works. But yesterday, Twitter’s iOS App Store listing updated to list Twitter Blue as an in-app purchase, confirming earlier findings from this unofficial source. Though users can’t yet subscribe to Twitter Blue – even after downloading app update – Wong dug up details about the service, signaling that its launch could be imminent.