Did you guys know this? Comment other's products on PH before they launch

Don't know if is a known thing and found anything on PH nor online. Apparently, you can comment other fellow Product Hunters' product before their launch day, and other fellow PHs can comment your product before you launch. All starting from the teaser page! Take for ex the teaser page: https://www.producthunt.com/products/jenium After the page is loaded, go to the url and change "products" with "posts". You'll land in the launch page. You scroll down to the comment section and you can add a comment and post it. Did you know this?