I received my season ticket renewal pack and for the first time I am considering the three year season ticket. Even if the club freeze prices the next two years (16/17 and 17/18), that would still save me just over £100 where I sit.
I phoned the club to ask whether there is a credit card surcharge, and there isn't. I would want to pay on credit card for protection, plus I get 1% cash back on purchases which is a bonus.
Three year tickets obviously aren't for everyone (or most people), but worth considering if circumstances allow.