Impact before ask
Numbers establish that a donation does something measurable.
A nonprofit page where the donate button is the whole design.

Cause leads with the mission, proves it with impact figures, then makes giving the easiest thing on the page. Programmes and stories carry the emotional argument; the donate path stays one click away throughout.
Donation-funded. Every section exists to move a visitor toward a gift, so trust markers and transparency sit above the fold.
Numbers establish that a donation does something measurable.
Removing the "how much?" decision lifts completion.
For visitors who have time rather than money.