I have tried navigate the page, but I still have not figured out what the goal was this year, who won, with which program and what has been obfuscated in it.
Is there a better summary of this contest somewhere? Is there a link I'm missing?
Who Won?: http://www.ioccc.org/2018/whowon.html
Guidelines: http://www.ioccc.org/2018/guidelines.txt
I'm actually of a mind to start a new webpage that does just that, but there might be some copyright issues there.
I think the simplest way is to just set up a site and make sure you cite your sources. The site under discussion here would be a primary source and should be listed as such on every single page that references any of the data found there.
Beyond that, it really depends on what the GP intends.
Start a blog and write a little blurb about each winner as separate blog posts? I don't think any permission is needed. Just write whatever you want to say about the project and note that they are the winner listed here and link to the page where they are listed.
Start a clone of the site that adds additional info? Yeah, you maybe need to go talk to folks and find out if they are okay with that and get it in writing.
Should be fine, no?