@dushman >The Librepay software itself is fully free though.
Free software that can only be used for running proprietary software is questionable.

If there was the option to donate via cryptocurrency on librepay, or at least a credit card form that didn't required running proprietary software (the FSF has that), it could be argued that it's libre.

>You can host your own instance if you want
There's no real point in doing so, as if you want to accept donations and respect the users freedom, you can just write in the project readme or front page:

Donate:
Monero: xxxx
<other cryptocurrency>: yyyy