I love this, I'm actually working on something very similar (accepting donations via Stripe/PayPal, but for a completely different niche), and someone (@czue) pointed me to buymeacoffee for inspiration. There are a few weird little niggles with the UI, but otherwise it's very slick.
What is the backend? Sadly WhatRuns can't identify it.
What is the backend? Sadly WhatRuns can't identify it.