Don't quote me on this, but they either use some sort of pin generator (wouldn't recommend downloading one) or they go to phone stores and text the service and get like 50 pins.
I don't think there's such things as a pin generator..
But there's methods to get free membership such as what david said.
(The methods are usually quite private if your looking for one)
Don't quote me on this, but they either use some sort of pin generator (wouldn't recommend downloading one) or they go to phone stores and text the service and get like 50 pins.