You keep 85% of Supporters revenue, after app store and payment processing fees. Payment processing and app store fees depend on what device Supporters badges were purchased from:
Support Badges purchased on a web browser incur a 2.9% + $.30 payment processing fee (paid to Stripe)
Support Badges purchased on iOS devices incur a 30% app store fee (paid to Apple)
Support Badges purchased on Android devices incur a 15% app store fee (paid to Google)
