Shorter strengthening lessons?
I usually do ten strengthening lessons a day (100 points). It used to be that each one was 20 questions long, then for a while it was 17. Now I've noticed that 12 seems to be the norm, with many of them being shorter. I just had 3 lessons out of 10 that were only TWO questions long?
Is this just all about ads? ie, the shorter the lessons, the faster you're back to looking at an ad? Or is it just me?