It is entirely a deterrant - and quite rightly so.The service is a privilidge, not a right, therefore comes at a cost. Plus, as it is, the demand for fastrack is too high and they do sell out, causing complaints anyway.The higher it is, the better imo. The less people who buy fastrack, the happier the entire world - the main queue goes quicker for it, and the fastrackers get a quicker fastrack queue.At the end of the day, its up to you to secondary spend. Moan all you like about entrance prices though .(In the case of towers, dunno if its more than thorpe or not, they hand out a LOT of free entry tickets and have a LOT of annual pass holders.. so rely on fastrack as secondary spend, and the fastrack should be high enough to still be a kind of value for them, but not too cheap for everyone to wanna use it).