For a sensor to qualify for the HODLER program it has to transmit more than 50% of the expected daily data streams.
For this to happen, the sensor has to be linked to an active license.
If you let the license of one of the sensors you have subscribed to the HODLER program run out, you will stop earning bonus rewards for that sensor.
So, you should keep an eye on the expiry dates of your licenses and make sure you renew them on time.
Bear in mind that you can already renew your license one month before it expires.