So why did they make losses if the tours were profitable in 2016 and 2017. Why are they going to make profits in 2018 and 2019?
You can keep your eyes shut but its evident that the tours in 2016 and 2017 were not profitable for ECB.
We don't know if there were other reasons why 2016 and 2017 were not profitable. You are drawing your own conclusion here that isn't mentioned in the article, but your initial framing suggested the article drew the conclusion as well - it obviously doesn't.