Doesn't make that much sense compared all to those 777-300ER sitting idle as well that are available everywhere. Emirates uses many of their 777 as standby freighters with cargo deck containers only. Passenger cabins being empty except for the exchange flight deck crew.
Quoting a part from the article: "Lufthansa Technik has completed a temporary cargo conversion of an A380 for an unnamed customer under the EASA eight-month exception. The project includes removing seating from both decks, although the lower passenger deck is able to carry more cargo."
Is there any airline or airport who has a cargo loader for the A380 upper deck at all? Only a very few catering trucks reach up there. I am not sure about the upper deck floor beams. They were not made for cargo.
So any A380 makeshift freighter is capable to carry containers in the belly freight deck and lighter weight cargo in the main deck, if it fits through the doors and can be manually loaded. The upper deck will be left unused.