The folks at VoIP Guides have uncovered a "secret" to free calling "forever." You essentially use an "infinite" number of email addresses and sign up for Jaxtr, which gives you 100 free minutes upon signup.
This is what happens when you are a one trick pony and you essentially give the service away. People always figure out how to abuse it.I've called Jaxtr's business model into question before. In light of the fact that Jaduka is offering a similar service, has a clear revenue model—hint, it's not this service—and has a more scalable infrastructure, I wonder what exactly Jaxtr's revenue or exit strategy is.