What country and region are you in? this makes a big difference as to what is allowed/tolerated (licensing enforcement can vary by regions).
Your links hint at an area where German is the main language; some Länder (or it may be the Gemeinden) are very strict about licensing (apparently you still cannot even dance on Sundays in those areas).
there does appear to be a standard EU rule that events with up to 500 people do not require as much licensing as bigger events and the cost is only a few Euros for the license (a fraction of the other production costs). Even in UK we can sometimes use this. In France some Départements don’t even want the paperwork if its a rural area and not too many people; but others forbid the event altogether. It often simply depends on what the prevailing view of the local community is there.
So you have to check the rules for where your event is going to end up.
As for the flyers; unless there is also a rule against litter and environment contamination / junk mail there surely must be hundreds through your door for shops, restaurants from all multicultural communities, beer festivals. In the UK they often say in the corner what print shop produced them (this is from an old legal requirement but is of course good advertising for the print company; as printing presses were developed in Germany I would not be surprised if the same also applies.
