Phase 3 must be where the exchange listing because how is this coin going to be spent on something in exchange if there is nothing we can do with the coin? But why asking for KYC. Is this for extorting the miners?

This PI coin doesn't exist on any market, you can't buy it for BTC nor a product of someone. Those who mine the coins are just mining it for nothing.
No sir, you are wrong for that. Pi is now listed on coingecko and traded to FUBT with a price of $0.347565
for your reference here's the link:
https://www.coingecko.com/en/coins/pi-network-iou#marketshttps://www.fubt.co/#/TradeCenter/piusdtBut i agree in one of your comment above that what will happen if someone does not pass in the KYC? that is the very sad part of the story. I admit that me too, Im very pessimistic with KYC i don;t like it. But up until now i'll always follow their announcement and as far as i know the dev has a gut to show their face on public video. So let's watch the development.
for a member with a lot of merit, you say nonsense ..
at the moment pi has no coingecko values it's not true, it's just someone who listed it without authorization
short do not dream of even a day pi at 1 € considering the number of pi which there will be at its official release, if it reaches the max price of 10ctm ca will already be enormous.
in short, the most mythomaniac project I have known .. no phone exploration, exchanges between members to give it an imaginary value for its official release, validated nodes kyc (private life we forget), pi preminer but not preminer because manually credited and can be deleted if no kyc .. in short this project has everything to please ..
I do not understand the people who are deeply involved in this project, he hopes it will cost more than bitcoin 😂😂😂😂
Bref ....