Unable to answer "Who is allowed to park here? Parking may be free or paid." – Parking Lot – https://osm.org/way/413458988 via StreetComplete 58.2:

Parkkis jaettu julkiseen ja luvan vaativaan, pitäisi jakaa kahtia. Takarivi vain paikan varanneille.

Attached photo(s):
https://westnordost.de/p/231215.jpg