“The Core Technology Fee is the only fee that you pay. Inside those marketplaces you can use any payment provider you want, you don't pay Apple any commission, you don't pay Apple any billing fee — the only thing you pay Apple in these marketplaces is the core technology fee.”

Third-party marketplaces flip the math — only CTF, no commission, no billing fee

Distribute through a third-party marketplace and Apple takes zero commission and zero billing fee — only the €0.50 CTF per install. The economics get interesting for high-LTV or paid-upfront apps that can absorb the per-install cost without freeloader exposure.