On September 19th, after suspending new subscriptions for eight daysChatGPT The Pro 200 tranche (Pro 20X) has been opened for repurchase to some eligible older users, but new subscribers and regular upgrades remain suspended。

OpenAI The Help Centre describes the disclosure that the portal is intended only for users who have previously subscribed to the plan: The account number must remain in place for $200 on 10 September, or its access will end within 30 days of that date。
Eligible users are required to resubscribe within 30 days of the termination of their privileges and have only one opportunity to resume during the suspension. Users who actively cancel, fail to renew or are downgraded from $200 to $100 (Pro 5x) may participate。
Previously, on 10 September, OpenAI suspended additional subscriptions and upgrades to the $200 slot due to excessive system load pressure. At present, 100 United States dollars is still in regular sales, and the two tranches are the same, amounting to five times or 20 times, respectively, to Plus. Full opening hours for new users have not yet been announced。