All I have mentioned are actually paying sites. The first two are browser based games that pays in euro. Been playing that stuff for 2 years now and I was able to CO twice (20 euro each), so yeah, its not kinda a good way to earn a living but just for fun.
Spark profit is a trading simulation that pays you in $ or BTC . If you are good at predicting price, you will earn quite fast . Been playing that for like 3 or so years now and was earning $6 to $10 weekly. If you are a good trader, you can earn some extra using this site. On average, I'm earning an average of $30 monthly which IMO is not bad considering that its a free simulation.
For bloggers, I'm sure they are familiar with easyhits. Its a traffic exchange site but at the same time you are earning $. For 3 years that I'm using that site, I have already earned about $10. It's too low to be considered as earning, but if you are maintaining a blog, it would mean a passive income for your site which in my case, I have already earned Php 15k + from my blog.
So there you go, I'm not saying you try them all at once, but you can choose which of them suites you.
May easyhits account ako,last 2009 pa at nakalimutan ko na,last month nakita ko sya sa isang ptc site,nag login ako,Himala after more than 5 years na di aactive andun pa rin ang account ko hehe Nagagamit ko sya ngayon sa mga referral links ko.
Hindi ba nakakaboring yan sir na 2 years of playing 20 Euro parang 1o Euro per year
Looking forward sa spark profit,mukhang maganda dahil natuto ka na,may kita ka pa.