EG. If each Governing Body(tm) member (Pee be upon them), were offered a few million quid/bucks each to rescind the barbaric 'no whole blood' rule? - this is an interesting thought.
But I think that they might well refuse this money, knowing that their refusal would probably lead to an increase of donations among the faithful (brainwashed) and save face.
The GB or whoever are in charge of the religion are pretty canny. They know how to keep their bullshit going. Let's face it, they've been doing just that for 150 years, lol.