Not even that. They already have Twitter Blue, a premium service that's 3 bucks a month. So they already have payments, they already have subscriptions and membership periods. They literally just need another plan tier added.
>The directive is to change Twitter Blue, the company’s optional, $4.99 a month subscription that unlocks additional features, into a more expensive subscription that also verifies users, according to people familiar with the matter and internal correspondence seen by The Verge.