I grew a product to $130,000,000. Here's what I learned
reemer.com
reemer.com
They don't mention what the actual revenue numbers are, but the fees are around 0.25-0.5% which is what the product pricing page says. That's $650k in revenue for $130m in donations.
Other ways to give include cash and cheque. Fees vary slightly based on a number of factors but were 5% on cash and higher for cheques (more labor intensive to process) when I left.