German bonus skills
In the German tree there are two available bonus skills - idioms and flirting. However, next to them in the app there is a + sign that leads to the store, where it is written "one slot open" but does not show are other skill. Any explanation?
There's supposed to be a Holidays bonus skill, that become available at the end of every year. Last festive season, however, the ordinary bonus skills worked really bad (many users buying them and being unable to use them), and, probably related, the Holidays bonus didn't show up. Let's see what happens in the end of 2018 :)