
According to the current Customer agreement, they will continue it.....however as usual
this is also subject to change...
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If you paid a "lifetime service fee," you will not be charged a fee for your DIRECTV DVR Service as long as you maintain television programming service from DIRECTV on the same account. If you disconnect your DIRECTV television programming service and later reconnect on the same account, your DIRECTV DVR service will be reconnected and you will not be charged a fee for DIRECTV DVR Service.
http://www.directv.com/DTVAPP/learn/CustomerAgreement.jsp
See para: 7 & note this agreement is eff Dec 2004 UNTIL changed.