In technology, sometimes hardware just can’t keep up with new software. This is the case with early Roku players, as “Classic” players prior to May 2011 no longer support HBO’s streaming everywhere service HBO Go. According to Roku, Classic Roku players “have a more limited experience than current generation Roku players due to ongoing changes in software.”
The affected Roku players include Roku HD (2000C), Netgear XDS (NTV270), Roku XDS (2100X), Netgear XD (NTV250), Roku XD (2050X), Roku HD (N1100), Roku SD (N1050), Roku HD-XR (N1101), (N1000).
Beginning July 14th 2015, HBO GO will no longer be available on the Classic Roku devices. HBO strives to offer its customers the best possible experience on the Roku platform. Due to Roku’s discontinued support of the classic Roku players, HBO would be unable to guarantee a great video experience on these Classic Roku devices. Classic Roku players (those made before May 2011) have a more limited experience than current generation Roku players due to ongoing changes in software. Unfortunately, HBO Go will no longer be compatible with these devices.
Devices made after May 2011, however, will continue to support the HBO service.
Source: Roku via ZatzNotFunny