They're selling prepaid "Ronin" cards. Or you can fund your account with a prepaid Visa card (hint: Pay in cash at a supermarket you don't normally frequent)
The SaaS part of it is pretty necessary. In order for your phone/pad to traverse a NAT firewall there needs to be a common device that acts as a matchmaker between callers. This also solves the problem of "What if the person I'm calling is at some random coffee shop, and not at home?", where they can't set up a firewall rule.
But really, their initial audience is business people who won't blink an eye at $20+ a month to secure their communications for a multi-million dollar deal. Not cheapskates like me. :)
The SaaS part of it is pretty necessary. In order for your phone/pad to traverse a NAT firewall there needs to be a common device that acts as a matchmaker between callers. This also solves the problem of "What if the person I'm calling is at some random coffee shop, and not at home?", where they can't set up a firewall rule.
But really, their initial audience is business people who won't blink an eye at $20+ a month to secure their communications for a multi-million dollar deal. Not cheapskates like me. :)