Applauze Web platform = Ticket price + $2 service fee + $7 either album = $9 extra which is the right around the average on the regular service fee. On the mobile app they also have $2 service fee, but fans get can both albums for the price of one or $7 per pair of tickets. Also - the app gives you $5 credit for every person you get to sign up, which can give you the best possible savings.
The whole Applauze thing is bullshit. Tried doing it for the WATIC tour, my venue didn't show up on the app and was unable to use the $10 credit I got for sharing. Wound up paying full price via the website.