They are supposedly trading at a high price at $43.20 in exchanges like HTX.
This is huobi right? It's not the actual PI that OP has mentioned but it's like a pi that made by huobi themselves to ride the hype of it but it's only tradable there, no deposits and withdrawal.
A few years back, I also participated in mining of PI coins, when its app was launched on mobile and managed to accumulate few hundereds of PI coins, later the team also introduced very challenging KYC process, it became apparent to me resized that the team might not be fully committed to ensure the success of the project not serious to make it a success. As a result, I stopped mining and ceased my involvement with the project, including keeping up with its updates.
I too gave up when they asked for KYC. KYC could be mandatory to centralized exchange and gambling site for regulatory measures. But I see no reason for a new crypto to ask for KYC. There are reasoning that they wanted to limit multiple accounts but they could have done it by limiting mining on one account at an IP. It's not the first that that a coin has tried to airdrop users through virtual mining but the problem with pi is they don't even have a real blockchain ever after all these years. There are fake success stories and scam marketplace going all over social media that too tarnishes its image.