Who would sell them? No sane corpo would shoot themselves in the foot like that.

And shoot ourselves in the foot while we're at it

It is.

But why not just keep it and get the tech used at home? You don't sell a valuable asset to an economic rival just to spite another economic rival. What you do is you cling on to every technological advantage you have in the market place and capitalise on it as much as you can.

give away our advantages?