Thanks! I didn't know about that site before and it looks like they have many contributors. I considered doing a bookmarklet like they do but I figured that I would need a critical number of people before it could be realistic to use.
In the meantime, I created a list[1] of popular stories from Reddit news sources. Each story links to a special hybrid page that allows you to write a summary on top while you read the story below.
Do you mean that you tried the tl;dr bookmarket on Skim That? I just added a summary for Skim That using the bookmarket so you should see it now.
I really like how it uses line by line bullet point fields to help write the summary. I experimented with something like that in the past. It kind of works but it isn't as smooth a read as a paragraph of text but it does make the writing process easier.
