Did that change in a more recent version? According to the (admittedly old) source linked from the Wikipedia article, integrators are allowed to skip HDCP but incentivized with reduced royalties if they do support it.
> For each end-user Licensed Product, fifteen cents (US$0.15) per unit sold.
> If the Adopter reasonably uses the HDMI logo on the product and promotional materials, then the rate drops to five cents (US$0.05) per unit sold.
> If the Adopter implements HDCP content protection as set forth in the HDMI Specification, then the royalty rate is further reduced by one cent (US$0.01) per unit sold, for a lowest rate of four cents (US$0.04) per unit.
