The hibernation plan allows you to keep all your data (prospects, campaigns, reports) for 9.99$/month.
However, all credit-consuming and data-modifying actions are disabled, which means that all campaigns are set on Pause and you can't add new prospects to your database.
You can now manually put your account in hibernation mode for as long as you want from your subscription page.
In order to do that:
1. Go to your settings
2. Get to the Subscription section
3. Click "Cancel my subscription".
4. Select the hibernation mode option