They also said this in the email announcement I got:

> As a thank you for being an existing subscriber and to help you continue to build your most ambitious ideas and transition, we’re also giving you a one-time grant of 62,500 usage credits (a $2,500 USD value). You’ll see these appear in Settings > Usage. They will expire on December 31, 2026, and use of the credits is governed by the Service Credit Terms.

I have no idea how much 62,500 usage credits are. Given the value they suggest I feel it's like one extra week of usage.