Hi, I was about to post my own thread about this.
Itch.io already has the ability to detect links on their platform, and indicate where they are coming from. I value comments on my page, I don't value people spamming links from malicious sources to it.
I could even go as far as saying there should be a whitelist that a developer can control, for instance, because I do appreciate people who leave feedback via a youtube video of my work.
But at the very least, you should be able to give developers the tools to prevent a comment of posting a link onto our comment page.