I think you are being silly and ridiculous.

Here's a transaction from the blockchain:
https://blockchain.info/tx/a244cbca647ad9cdd01fe7d79744916857dd26360e2d284b81599e5e689e8904

Since you think that "ever bitcoin transaction of a company/brand is open and public in every computer mining it! Everybody know to whom this company sells/buys, which sums, etc etc" . . .

Looking at that transaction in the blockchain, please tell me who owns the address 1ajECz2AtEZpXfvit9977Rgid11Y7AexS ?

If you can't, then please consider that your statements are a waste of time.