You cant really look at it as a $9.98 charge though ($4.99 additional reciever fee $4.99 DVR service fee) for 2 reasons. First: If this is your only reciever or your primary reciever, you are not paying the $4.99 additional reciever fee. Second: if it is your second reciever you would be paying the additional reciever fee even if you didnt have a DVR reciever.
The $4.99 DVR service fee covers the DVR funcionality for all the recievers on your account, so you only need to pay it once. Also the DVR service fee is waived if you subscribe to DTVs Total Choice Premier package which includes all the premium services (HBO, Showtime...) for $90.99 with local channels.