'That money' was never there previously. German jumpers used to jump at RAPA (a BPA DZ on German soil) without being asked to join the BPA. Since they were jumping in their home country it was only polite, and their quite satisfactory German insurance was considered sufficient.
This contention arose because the BPA (at the behest of a clause in their insurance policy) moved to require jumpers at any BPA DZ (including RAPA) to hold BPA membership / insurance.
Of course, this change does mean that German jumpers have had their freedom extended to using their insurance in the UK mainland without further interference from the BPA - however other posters have discussed the risks (or reduction of risks) of this above.
So, what's fortunate IMO is that an argument that started between the BPA and Paderborn Parachute Club over the use of a local DZ (RAPA) grew into an issue that has ended up breaking down some rather unfair boundaries. Maybe it will go further.
In fact, dare I say it, had the BPA quietly let Paderborn Parachute Club have their way and continue jumping at RAPA as Ludwig originally lobbied council, maybe we wouldn't have covered the ground we have.