[JJzD]

Imagine how hard it would be to keep the lid on this operation, and how damaging it would be if it ever came out and what the legal repercussons would be, for example from EU side?

So, you'd need to vet an ultra secure team, who is not allowed to talk about this data both to use and store it. Or you have to publish a representation to wider teams telling them 'these are secret feautures'. So, you'd need a secret code base nobody is allowed to talk about.

Corporations can do shady things, but it's hard to imagine this old data being useful anyway, to be worth all this hassle and possible repercussions.