Of note is that starting a marketplace takes a stand-by letter of credit of €1,000,000 [0], so no getting around the core technology free by just starting a bunch of marketplaces.
According to the docs, an NGO has special fee waiver of they want to, but then all apps they distribute must also be of fee-waived organizations like NGOs. So there could be a marketplace of just NGO apps with 0€ fee.
In the EU, on iPhone only.
