That's a pretty common way for people to build fake credibility. They post something saying "oh I went 50-20" and then in the next month if they run hot and go, say, 10-5, it lends credibility to their "posted record" and makes some people think that it's credible even though there is no verification that those previous bets were ever made.
Is there a way to see cached versions of the page, before some of those games took place? Can the date/time at the bottom of the posts be verified in any way?
google cache, archive.org
Looks like archive.org has one hit for it three days ago.
I'd imagine I'm using google cache incorrectly as I can only go to the cached version of the page from a few hours ago, I'm not sure how to use it to see the page as it appeared, say, three weeks ago.