Thorpe's online price is more expensive than Paultons and Blackpool. So it's not debatable - they are the theme park with the most expensive online ticket.
This is an online ticket at a time when online pre-booking will be pushed more than ever, perhaps even be essential. So regardless of what percentage of people bought those tickets beforehand, that percentage will be increasing.
It may be part of a bigger push on buying season / annual passes, but it doesn't stop the price being high in its own right.
Weird to compare a theme park price to a gig price? Sure, there's some similarities, but they're both very different markets.
When you look across parks in Europe, £39 is at the premium end of theme parks. And whilst, in fairness, the ride hardware on offer at Thorpe is pretty premium, is the overall experience a premium one? Arguably not.
Looking at these differences (for adults only, I think it's crazy that child prices aren't cheaper tbh) is really interesting. Legoland and Chessington are pitched just right, and even Towers' I can accept. But Thorpe's is the one that's off base here. It just doesn't fit.
Unless the other parks are increasing their prices too and Thorpe are ahead of the game, it just feels off.