Pretty sure its not his strategy. Its also not the sites fault. Basically that's why its called gambling and usually you lose more than you win. Hence many just do it for fun.
True. Otherwise, we'd have called it strategy game instead of gambling.
You are wrong. For gambling you need luck but it can help if you got a good strategy. For example in roulette if you always play red and black you can only lose. Hence bad strategy ;-)