They are just swamped with signups. Sometimes the site is down, but it usually comes up again in a short while. If you tell your friends about GP and they join under you, you will also earn money from their Internet activities. The more people you get to join your downline, the more money you can earn. You don't even have to be online and you can still earn money from your downline.
Some members have hundreds, even thousands in their downline.
Their earnings will be huge every month. Of course, if you do promote, you will get an even bigger downline. Join now and tell your friends to join before someone else does. Then click on payment centre on the left side. There are several ways to submit the payment.