+1 for the, errm, +1 comment!
+1 channels served their purpose back in the early days of Satellite, Cable and Digi TV days, when people either didn't have a DVR, or if they did, it was a single channel affair,
But now that time-shifting DVRs with 2 (or more) concurrent channels, are common place, even pretty much standard equipment these days, then there really is no purpose to these +1 channels now, and if you did miss an episode of something, it's likely to turn up on the relevant on-demand service soon enough anyway!
I've no real issue with them existing on Satellite and Cable, as they have the bandwidth to carry them along with 100s of other (mostly worthless) channels, but digital terrestrial has a very limited bandwidth, so personally I think using that space for a +1 is not just waste of available bandwidth, it aught to be outlawed outright.
So use the space for something useful, new content, or an additional HD channel, don't waste it on a +1!