I think this is likely the way forward. I am just loathe to in essence pay upfront for 6 months of membership purely because I want to buy some software. Ancestry should come clean - it's the months we are paying for not the software.
I love the Ancestry app on my phone and tablet (which are free). Nobody is making me pay for subs to use this but the app would be fairly useless if I hadn't taken out a sub. Maybe the makers of FTM might want to adopt a similar model?