Until the plastic runs out. I was confused by the comment as well but I started thinking about the disposable movement - cheaper to just make and throw away plastic utensils than for McDonald's to have flatware, and remains cheap if there's buyers for the plastic.

A good solution with unfortunately perverse incentives. Probably the solution is government bans on unnecessarily wasteful uses of plastics. The market is provably incapable of tackling environmental issues without regulatory encouragement.