For me it looks like AM is not willing to issue profits as dividends to the shareholders. So they set up another company, which is maybe RM, holding 80% of RM's shares. Then they sell the chips to RM in a lower price, which means lower dividends as AM's shareholders would expect. Then the margin would be totally at RM's side.

======Everything above is only my assumption.======

Unless there are other companies than RM are also purchasing chips from AM, then I would highly doubt there is benefits tunnelling behind the scene.