But that wouldn't really qualify as MQA as there would be no-way to cover the authentication.
For example, if the files originated from upsampled files and became MQA then we would be back to the earlier HD Tracks complaints. The MQA would not really be authenticated along the whole audio chain.
Now, whether they could licence the compression technology and put out MQL (e.g. MQLossless) is another matter. They could stream 96/24 this way.
What the consumer doesn't need is MQA decoders AND an bespoke Apple/iTunes equivalent.