In the songbooks we've created for church use, each copy of the people's word books and our players' books of chords specify that "copying is a no-no." This is not because there's something unique in our arrangements, but because frankly I expect people to do their own work and not imitate our approach.
It was hard work to create arrangements in multiple keys for various songleaders-- making them all uniform, etc., using certain conventions of indicating things.... they're just for us and anyone we choose to play with or incorporate. They need to be kept uniform and not have keys missing or stuff added to one binder not also added to the rest of the set... fixed errors in some binders but not in others..... the goal being that anyone can pick up a binder, sit in without rehearsal, and fit right in.
I'd expect someone wanting to do the same songs beyond that to put in their own work making them their own.
OTOH-- some of these arrangements will shortly go into a freely-available form for song circles, so I guess I don't care as much as I once did.