I've had my card for nearly 3 years now and usually if they put their prices up, you get a warning letter at least a month in advance (maybe more). I've not had a letter informing of the price increase so hopefully it won't go up this year!
The card is definitely more for the people who go a lot, I try and go at least once a week - the most I think in a week was 3 or 4 times, which more than paid for my