You might be wondering how you can possibly win a jackpot for free. There is a little known secret that online casinos will give players free casino promotions in the form of cash or credits just for registering an account. Many of the online casinos will even allow you to play the progressive games where you can win a jackpot. It is just a matter of locating the ones that will allow you to play progressives. Your best bet is choosing a Microgaming casino as they are more likely to allow the casinos powered by other software companies. If you are unsure whether or not it is permitted then just contact the casino support via chat and ask them. Makes sure you keep a screen shot of your chat just in case you have issues in future with withdraws.