Currently we're an OpenCollective project underneath the Platform 6 UK co-op. We intend to incorporate a nonprofit or co-op in a friendly country ASAP, help/advice with that is appreciated. Countries like USA, Ukraine, etc, are less preferred due to economic/currency/geopolitics/stability, but UK, EU, etc, have popular currencies and policies that could make it easy for the project's largely-English-speaking (but global!) user base.
Most money is planned to come from donations, and most development from volunteers.
Good idea! I've made an issue for it