do donations need to be truthful in plain terms of how the funds are used ?
I think in 2023 parlance the claim is probably plain enough to be "truthful".
Giving gold supports the contributors you love
It's pretty well established that receiving gold on reddit is perks like... a gold star or something, rather than actual real gold.
The only way to answer this question is to investigate the circumstances of specific examples.
Generally, the person just doesn't have the money. If Giuliani bought his nephew $100m in shares 10 years ago, who's to say those shares do not in fact belong to the nephew.