How exactly do ICOs work? I found one that is selling their coins for 3/4 off. I'm not too sure how the distribute the coins, I saw this on their website:

"The minimum investment to receive your money back is 1.000$. return  will be made every month for 12 months. Every month you  will receive 8.4% of your funds to an even 100% when 12 months. The return is via BTC, ETH or USDT not via SilverCoin."

When I purchase the coins, do I not get them until after the launch or what? I'm kind of confused.

This is the ICO in question: https://silvercoin.asia/