Roding Music makes its scores freely available in order to promote West Gallery church music as widely as possible. Nobody is ever going to get rich by publishing this repertoire. If I wanted money, I could earn more per hour sweeping floors.
But if you value what you download, you may wish to make a Paypal donation. There are expenses, mostly for the maintainance and upgrading of hardware and software, and also for travel to libraries and elsewhere where West Gallery scores are available.