Yes, Blueberry Futures does have an inactivity policy:
If a trader does not place any trades for 30 consecutive days, their account may be considered inactive and subject to closure or forfeiture of any progress or eligibility.
This applies to both evaluation and funded accounts, and is in place to ensure that accounts remain actively managed and reflect genuine trading activity.
To avoid this, simply ensure you place at least one qualifying trade within each 30-day window.