A couple of people I know got signed up for Quechup. My address was apparently “harvested” from the address book of these folks and I’ve been invited–multiple times, even–to join this service.
I’ve looked through this service and I see absolutely no reason to join this place. It looks like a lame me-too service with no obvious value. The fact they want an address book is very irritating. Given the relative intelligence on the Internet with regard to these matters, I suspect I will see a lot of spam related to Quechup. Even people who do know better occasionally get sucked in.
Bottom line: avoid these twits like the plague.