[mindslight]

Without imaginary property, AMD would have signed a similar contract - they would rather focus on their own products rather than reverse engineering the HDMI standards to create their own implementation. At which point AMD would be in the same position, unable to reverse engineer HDMI or adopt solutions from other companies who did.

Imaginary property laws most certainly encourage and facilitate monopolies and collusion, but they are not necessary to the dynamic. Such laws are essentially just the norms of business that companies would be insisting on from other businesses anyway, for which it's much more lucrative to assent and go along with rather than attempt to defect and go against them.

Another example of this effect is the DMCA - the tech giants aren't merely following its process verbatim, but rather have used it as basis for their own takedown processes with electively expanded scope - eg why we see takedown notices pertaining to "circumvention" code, or the complete unaccountability of Content ID. Google and Microsoft aren't significantly hurting themselves by extralegally shutting down a tiny contingent of their customers, meanwhile the goodwill they garner from other corporations (and possible legal expenses they save) is immense. The loser is of course individual freedom.