They still use their BelugaXL (A330) for Airbus production sites.
But they created a company for external customers so that “anyone” could rent a Beluga to transport oversized fret. They transferred the older four Belugas (A300) to it.
That’s what they are shutting down.
The aircrafts will be transferred back to Airbus usual transport duties, dont worry you will still see the XL flying at Airbus production sites. But they said they are not certain what to do with the older A300 variant.
Just the usual hypothesis in AVH comments
https://avherald.com/h?article=5233baba&opt=0