you are speaking about _one directional consecutive rides_ I.e. 10 rides are just 5 trips if you have a ride home from work and take some side route to stop a

you are speaking about _one directional consecutive rides_ I.e. 10 rides are just 5 trips if you have a ride home from work and take some side route to stop at a shopping mall or Kino or so that counts as an additional trip but someone using it for work daily tends to have more then 42 rides a month not just 10 and that is just for work transit in a 5 work day week and then this is assuming you only travel in the AB area and not the outer area of Berlin and there are many (in summer) nice places close by Berlin, some still in the C area some beyond lastly, it's very convenient, I mean since I don't have a semester ticket anymore I forgot to buy a ticket way to often and just was lucky to never got cought