Yes, but that is not very realistic. First at all you can't compound, you'll need to purchase new shares with a new lock-in period. But I agree, the result could be similar after a years time. But more important is that Brandenburg confirmed to me that there are limitiations in the volume they are able to use for trading. Once they reach this volume - which also depends heavily on if and how much people repurchase after their shares are expiring - there might be times when no more shares are available to purchase.