Not really.. We have upgraded all the games, High-Low was the last one but we noticed that over 90% of the bets were betting the numbers would stay the same.. so instead of redoing the game we just made a new one in the format High-low was being used.
Yes, and you cant just give away free money all the time 
As for the race, no one was straight scamming, it just wasnt fair and didnt do what we had wanted.
I know nobody scammed but they find a way to abuse the system and earn more money.It is understandable to me why this needed to be corrected and make it as fair as possible.
You can never going to please everyone and make perfect system.