this may be a stupid question but why is it hard for you to give OpenSSL money?

if this were a Dutch organisation (and I could spare that kind of money ...), I could either fire up my online banking and transfer it without any costs, or use the (slightly easier) iDEAL option and it'd cost them about 50 eurocents + 0% per transaction.

not even just for the Dutch btw, since recently, if they have an IBAN bank account number, you can just transfer money there (well, not to the US, apparently, but in the EU, parts of South America, Africa, Asia, ..[0])

[0] https://en.wikipedia.org/wiki/International_Bank_Account_Num...