A 'clickthrough' is a page or page overlay you have to click a button to get through
Uhm. Where is that term used in that way for a confirmation dialogue? A clickthrough is the mere fact that you clicked a link that was shown to you. It is the basis of measuring clickthrough rate.
And since itch has no ads, your talk of adblockers was quite strange. (Imagine the exlamation marks as me saying huh? what is going on here. Because that is what they meant)
Since you do not want to use the report button, any feature request for it are beside the point - as those report buttons are only attached to projects and postings. You already were told that you could tell staff directions how to find the unflagged page. How do you think the admin meant you would contact itch to provide said directions?
And what I suggested was to just look at your browser history, and copy the url. No directions needed.
There is a contact button on bottom of page, it leads to another button that opens your email client.
If you do not want to do that either, you could also open your profile and click the feedback button on the left side and select other. There is a css bug that will hide the feedback button if you zoom the page.
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Oh, I forgot. That report button and the feedback button will still send you an email, so if you do not want to have itch mails in your mail account, you should be aware of that.