Cool idea, but it would be nice if it automated Paypal, Amazon, Bitcoin and/or Google as well. I think that asking for a Credit Card can be a barrier to getting donations.
If you look at the Humble Bundle for example, Linux users consistently outdonate windows users in voluntary transactions every single time. Bitcoin is a bit like that, too, both because of the type of crowd and because people are eager to spend and use bitcoin and to support charitable organisations that participate in the bitcoin ecosystem.
Lastly, it's an interesting angle because payment processing costs 0% for charities, yet the payout is in dollars, euros or a bunch of other currencies including bitcoin (just like for any other business btw if you use Bitpay)
It very much seems like charity is one of bitcoin's biggest usecases at the moment. Not saying it's the best thing ever, but we shouldn't discount it as there being no interest and no charitable bitcoin users.
But that's not really the question; the question is if there are enough to justify the development effort and, especially, to justify prioritizing that over other options like PayPal.
Regardless, the point is fair. You could probably raise a few dollars by selling hugs in the streets, doesn't mean it's the best way to spend your time. Whether bitcoin is, it's hard to say. It's definitely small and nascent, no doubt about that, but it also means its users are more eager, more engaged, on average. As in, if you take a million average bitcoin users and a million non-bitcoin users, the former I believe will raise a ton more money. But given there are only a few million, it's inevitably going to be small in absolute terms. In any case I was just replying to someone saying non-profits have near-zero interest and I disagreed.
Except if the company is applying at PayPal and is large enough (e.g. Twitch; German users can indeed subscribe to channels), because PayPal is basically granting the account owner (company) the right to just deduct money from the donator. And for this they need to trust the company.
Source: We called PayPal support last friday because we tried to make RPs work with German customers in one of our projects, but had to cancel that plan because we are not a large enough company (i.e. we didn't even apply for this kind-of secret treatment).