Yes, the language is wrong in the platform site and must be fixed. A version without mistruth:
Your tier level is recalculated at the time of making a new credit balance purchase, based on these criteria:
- the time between the organization’s initial credit purchase and now,
- the cumulative amount then paid to OpenAI to purchase API credits.
You must interact with the payment system to receive any tier re-evaluation by making a new credit purchase; it is never automatic.