[capableweb]

Watsi seems to offer donations via credit cards and Paypal, neither which I think supports $2.4 Mil donations, but I'm unsure, never tried it myself. Watsi overall don't seem to fit the "no restrictions on who can donate" part either, as they are an American non-profit (subject to US laws, including embargoes).

[toomuchtodo]

Can you name a non profit not governed by nation state monetary and financial regulation policy you'd donate to? I cannot.

If I was going to donate a substantial sum to Watsi, I would wire it to them and have the wire receipt as proof of money transmittal.