These are very fair questions.
The Kleros cooperative is very clear and transparent about where money is spent, publishing an annual report. Kleros Annual Transparency Report 2020. We can expect the bare minimum same from Democracy.Earth.
Why should PoH use a $ubi token which had a premine (https://etherscan.io/tx/0x9d087e4ba6ee12f79276bd64ebb75d7965ea8c92c5354d2fe8976fb4771518b9) for a whale?