1.Invite your friends
Send them your invite link or let them register with your invite code
If you have a former invitation code that starts with 0, it's still valid.
2.They get cash and stock cards
$2 for opening an account, and a stock card for depositing ≥ $100
3.You get stock cards
You get a stock card up to $160 for each friend who deposits ≥ $100