Believe me if it was that important they would have done it.
I think you miss the point entirely.
To start with, the portable iOS devices have largely heavily all been JB'd now, hence the community around the hacking of them continues as it's always done since the earliest iOS breaks.
This thread is specifically talking about the
ATV3, which users want to plug into the 2nd/3rd/4th TV's in their homes with the
client software versions of Plex or XBMC, in order to have content stream from where their main TV usually is connected to (for example) a Mac Mini –with external storage hanging off it containing their whole video/audio libraries– which thus has the main
server software for Plex or XBMC.
ATV3 offers
1080p streaming from server to client (which ATV2 doesn't): that's the whole reason for a jailbreak of the device to be important to several 100,000 users.
Hence surely a great incentive for XBMC/Plex specific hackers to get into the thing for both their own usage and the mass XBMC/Plex community as a whole.