Once I reloaded with free coins and wins from the free spins, I finally started hitting some larger wins that prevented me from running out of coins (but still only $5-10k), and I think about 4-5 hours into it around level 35 I hit a $50m jackpot. I also had something in my inbox for 25 free spins on another game, which I did and won some coins there.
I ran out of coins before hitting a jackpot, and had to go searching the internet for free coins to load up again, but there were plenty of sites available for this. I stayed on Bank of Jackpots with bidding 100 (minimum bid). I just did this one yesterday too, and had a similar experience.