Morbid curiosity: you want to install and run Asterisk, the PBX software, on a $9 VPS from a provider that just announced with a Bootstrap template today?
It was cheap and Stripe is secure. I could part with $9 to play around with a potentially shitty service. I was going to run an instance of Lenny on Asterisk, so it's not like I was doing anything important with this.