Just signed up for 15 months PriorityPass (Freddie08) 339$.
I think that is a reasonable rate that one can live with.
It means 22.60$ per months, respectively what would have to be paid for one visit or more if purchasing a daypass. The recent experience getting stranded in gate areas like SFO where there is no US lounge but an Alaska Air Boardroom reminded me I should do something.