When I checked about 2 weeks ago (because my jackpots stopped updating), I noticed that Playtech seemed to go back to an old version of their jackpot code.
So, I commented out the new code I had for obtaining jackpots and went with the old. My guess is if you have jackpot tickers from over a year ago, they would miraculously start working again 
progressive-watch.com grabs the jackpots every hour and it has the latest values as of just a short while ago.