You cannot. It would be invasive.
Viewing post in Can I see unique players on the stats page?
Do you have any idea how analytics work in this day and age? How do you think google, facebook and youtube show you ads, they randomly guess your tastes and interests? No. This is called data gathering so you can cater content for your users. Next you're going to tell me that that there aren't websites that don't track what you look at in order to toss you some ads related to what you've been looking at.
Also, OP said he wants to see unique players and not stumbled-across viewers, not to mention that how would you even spam them? Look at their profiles and hope they've commented on another game or community thread just to reply to them "HEY I SAW U R PLAYIN MY GAME. HAHA. U SHOULD GIV ME FEEDBACK."? You just sound like a troll.
In any case, itch.io offers Google Analytics support so you can track even more data than the basic one itch.io provides which honestly is a bit lackluster and sometimes isn't even accurate.
How do you think google, facebook and youtube show you ads, they randomly guess your tastes and interests?
Through unethical spying on my previous viewing history, along with over-the-line data such as where I hovered my mouse.
This is called data gathering so you can cater content for your users.
It is also the prime source of closed echo chambers that breed extremism. Also, how do you propose you would do this with unique player information? What you’re talking about is Itch’s job, not yours. Itch certainly has the unique players list, so all you would be able to do is exactly “HAHA RATE MY GAME PLZ”.
Next you’re going to tell me that that there aren’t websites that don’t track what you look at in order to toss you some ads related to what you’ve been looking at.
There are. I don’t use them, because they’re performing unethical practices. If I wish to watch a YouTube video, I use Invidious, because that way Google doesn’t see me. I don’t touch Facebook nor Google with a lightyear-long pole.
I would go one step further, and say that all analytics is unethical. If you make art you enjoy, you don’t care how many people see it.