how do you know if an online work is illegal or not?

Look,that thing i dont know but if you want to earn some serious money then try data entry job i am doing data entry job in www.cgets.site88.net and it is not scam.Becouse i got 13 payout in last 6 month.They always provide work and work is very easy you are just to type from image.Even your mom can do this.Me and my father's friend currently doing this.It take some fees at initial stage but you can earn that money in 1 or 2 day easily.Just do it and you will say thank to me.good luck.