We've been paying ~100 a month for the last 13 years and got an email earlier this month:

"On your next renewal date, August 31, 2026, your account will be transitioned to a Harvest Enterprise plan with Unlimited usage billing.

You will be automatically billed $2,199.50 for your new monthly plan.

You can always downgrade to Flex usage billing, which would have an estimated price of $416.05 and would adapt to your monthly usage.".

Needless to say, after 2 days with Codex the account has been closed.