I think some people hold certain weekends for events etc and then confirm later, so not necessarily booked on all dates. That’s what happened to us last year anyway as our weekend became available later.
Regarding price, it has gone up year on year and add to that the pound to euro conversion, things are starting to get really expensive. Also, no discount on drinks and food when you stay there, so it can end up costing you a few quid.
The last couple of years we haven’t left Pikes, so save on taxis and club fees etc (that’s sort of how we justify it) Years gone by we used to stay for 7 or 14 night, just a long weekend these days.
We have discussed as a group that we may explore other options next year as prices don’t reflect what you get.