Do you know any alternative to #BountySource, #FreedomSponsors, #Gratipay or #Liberapay to fund free software projects?

#OpenRefine is looking for a new solution.

@Liberapay thanks a lot! btw I did push for Liberapay but some backers like to put bounties on specific github issues
@pintoch The desire to fund solutions to specific issues is understandable but in practice bounties generate overhead and other undesirable side effects.
@Liberapay also the lack of paypal support was apparently a problem, but I know you don't have control over that :-/
@pintoch For the record can you tell us if they wanted PayPal support on the donor side (payins), or on the recipient side (payouts), or on both sides?
@Liberapay I think it was on the donor side.
Payin via PayPal · Issue #424 · liberapay/liberapay.com

MangoPay has implemented PayPal payins, this feature is currently in private beta (source: Mangopay/mangopay2-python-sdk#64).