So much so that in another thread you indicated that you recently used one, saving a small amount of money?
Yes.
Ignoring all the dross relating to LNER calling there a couple of times a day, the fares are thus:
Anytime Day: single £4.80, return £7.10
Off Peak Day: return £6.00
Advances (ignoring the LNER clutter and other dross): £2.40, £2.20, £2.00 (and there appears to be a £1.50 one in there for the "Rail Sale"). On the day I travelled, only the £2.40 appeared to be available, and was available on every train except those few continuing onto the S&C.
The obvious thing to me there is to insert an Off Peak Day Single at £3.00 and clear out all that junk.
I was hardly going to pay £4.80 for a ticket for the next train (it didn't influence which I took) when I could pay £2.40, but this is exactly the sort of pointless dross that makes the railway confusing.
The West Yorkshire EMU services are basically Merseyrail with a Yorkshire accent. We must surely agree that there would be little more ridiculous than Advances on Merseyrail, except perhaps having them on London Underground.