It is (I watched that exact site the last two cycles). It's being manipulated to hell now since lots of people started paying attention to it. None of the betting sites are accurate (just like modern polls).
You can't bet on it, but it aggregates the odds from other sites.
Basically, if someone who does the research is actually die-hard believing Trump can't win Pennsylvania, they can make a good amount of cash by betting on Harris in the next 2 weeks.
But the fact we see all these articles and Trump's odds have (only increased), probably means these articles are horse shit
The problem is that informed opinion thinks that Trump has something around a 50% chance of winning there. That's a kind of risk that regular people can't put serious money into.
Please understand that your special interest for betting on electoral outcomes, which you developed in 2016 due to your Statistics Prof betting on a Trump win, is not something that you need to share with other people. Betting is sad and tawdry, and telling people that a political platform which doesn't do much to differentiate itself from harmful authoritarianism is quite likely to win is also harmful.
I'm posting it because people are huffing copium thinking "Trump is done!!" When there's a lot more that needs to be done by the left still. People read news articles like this and get complacent because they think the dems have secured Pennsylvania, but it's not true.