well i dont understand the game we get free btc? and if i invest how much interest i get on back ? and for how much time .. please clear this..
You put your Bitcoin address in the address field and type in the captcha. The odds of winning are low (usually somewhere around 10 percent), but if you end up winning, you get about ~6,000 satoshis (I think the number varies as well) which would normally take about an hour to get with a faucet. After you play, you have to wait one day before you can try again.
I've never used the invest option but the amount you earn and the time it takes is displayed in the table on the site (e.g. Investment: ฿0.03, Weekly earnings: 22%, Time period: 35 days, Total profit: ฿0.003).