Because their UI being innovative and one of a kind might well be a corner stone of their product marketing plan. You and I copy it, and they can't market, sell

Because their UI being innovative and one of a kind might well be a corner stone of their product marketing plan. You and I copy it, and they can't market, sell and recoup the expenses as planned. Though in this case I suspect this is one of a "valuation booster / acquisition facilitator" patents rather than anything else.