Their commercial motivations can vary, and may include collecting and monetizing data on users' web traffic or other personally identifying information, and/or sharing it with third parties. You're theoretically not anonymous from your VPN provider, and you have to place a lot of trust in a random third party to tunnel all your traffic there.

We have a ton of servers that we're constantly updating, and a lot of differently methods of tunneling users to our servers. So they can blocked if censors a) block OpenVPN completely, or b) enumerate and block their limited server IP addresses.

They typically use a single VPN transport (usually OpenVPN) and only use as many servers as are needed to supply their users. Other VPNs: They're not designed for circumvention, and we are. How does Psiphon differ from other VPNs and circumvention tools? In April of this year Localization Lab hosted an Ask Me Anything with the Psiphon team to bridge the gap between end users, contributors and developers, and to highlight what makes this open source circumvention tool so unique in the field of proxy and VPN applications.

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