We have to agree with you. If the case comes that they give you free money to play games on their betting sites then this attempt will make you addict and after that you will start to deposit your own money to play which harm you, your family and your financial condition so Islam forbidden it.

Playing games for free is not bad but make sure that it do not waste your money and your time. If you notice that it is wasting your money or your time then it is not allowed according to my knowledge.

These points were in my mind about that case further a mufti know about these matters well than us.

jee Sayeds bhai you are right...  betting haram haram aise he jese "سود" haram hai.. aur future trading/margin trading looks like combination of both betting + interest. Baqi yes ye hama ki individual understanding hai aur ye apka bilkul personal decision hai... jese for me I will avoid these at any cost... and on other Pakistan main saving account + banking loans sab interest pe chal rahe hian and no one bat an eye. in the end not please do your own research.