It wasn't the increase that I was having a pop at but the disparity between the increases between the two offers (ie when promotion wasn't a certainty and when it was).
To all those who have come back saying that the increase in sales is as a result of the tail end of the season - precisely. The trouble is that the STGs in Apr/May were not (mostly going on about performance. The 'reason' the ST sales would lower was cited as being the club's attitude to its fans. There were a few of us (not RTGs - simply realists) who believed that a reasonable latter part of the season would reap rewards. It did.
People were moaning about the change in policy on renewals and a few said it could/would prevent them from renewing.
The run of form and prospect of Premier League football provided a boost to ST sales.
The end result is a net rise of 7% in season ticket sales. I don't think that has anything to do with the shift in renewal dates but everything to do with the teams performances and the potentially good value Premier League ST if purchased last season.