Ask HN: Best service for distributing funds in an open source donation business?

I'm building a platform for open source donations where contributors get paid for resolving issues (https://openpledge.io?source=hn5) I’m looking for the best service to handle fund distribution (e.g., Stripe, PayPal, Payoneer, Mangopay, etc.).

Basic concept: Multiple pledgers (donors) pledge (donate) to one open source issue, and when there’s enough funding to attract a developer’s attention, they solve the issue and receive the reward.

I’ve integrated Stripe Connect, but I find its developer onboarding process quite complex, especially for those receiving payments.

I’d like to offer developers multiple withdrawal options.

I’m aware of crypto/blockchain as an option, but I’m not familiar enough with it yet to fully explore that route.

What would you recommend for this type of model in terms of low fees, global reach, and ease of integration?

I’d appreciate any experiences or suggestions!