Hmmm.... this is an interesting one, and I'm about to get splinters in my @r5e
On one level, I'm surprised that these services are commercially sustainable. FK may have historic data on them but it will be some years old. Can't recall when they lost Winter Sunday evening services (2014, from a quick google?). Therefore, I can see why that and the timing might support a view of it being a spoiler, and it's something we've seen countless times across the UK and across they yeras.
That said, MMH et al have a record in developing services (see Southern Vectis) and doing things that seem pretty unlikely, such as a comprehensive Christmas Day network, so perhaps it is also part of a genuine plan to develop these routes further?
Whatever the motives, I guess the council benefits and so do passengers from inter availability of tickets so a positive step, however you wish to look at it.