Some of us has testimony particularly from playing Dice and Crash on Stake.com gambling site. I do not really deposit money at some point but I do make use of monthly reload to make good money in playing gambling. You can equally give a try and not necessarily waiting to see evidence of whether people are actually making money from playing gambling or not.
Maybe with free sound and wagering you have a similar experience with me but again the money you make from those free activities may not be that huge to make a testimony, and lots of users here who have won various big amounts from gambling sites may not want to share the story in public.