linden lab has no obligation to monitor or enforce your intellectual property rights to your user content , but you grant us the right to protect and enforce our rights to your user content , including by bringing and controlling actions in your name and on your behalf -lrb- at linden lab 's cost and expense , to which you hereby consent and irrevocably appoint linden lab as your attorney-in-fact , with the power of substitution and delegation , which appointment is coupled with an interest -rrb- .