Pro-rata my season ticket in the Street End costs me £25ish per game, which isn't too bad and I think reasonably affordable for a fair percentage of people.Spot on
I love going to the game, but really can't afford to go - Like you say it's probably getting up to £70-80 to go a match
Working on a normal salary, paying mortgage, student loans, household bills etc - There just isn't enough left to justify it
The issue is that I at least spend around that on ale at each match, if not more; then you have to add in the cost of a bit of a scran and the transport and it's close.
With the cost of the BMD likely to increase tickets to some extent, I can see it only being more expensive - the ale too.