Hi,
well, I understand, that christian composer's have some rights too.
But I think, they wrote the songs to serve God. It will not match with this intention, to forbid the using of the songs under some conditions "Pay money and you are allowed to serve God using my song".
I will not say, illegal copies are right, but I think, some things are more important than copyright.
What may we think, if a christian song writer would take a court, because illegal copies, not used to make money but to serve God? "Right done, because the law says, it was illegal"? Or maybe "What kind of christian is this, serving God or money?"
So some christians maybe ask "May I play a pretender's song?"
Don't forget, when the people don't buy printed music, because they refrain from playing the songs, one can't take a court. to get the money.

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Regards
RF