A lot issues with nodes from USA ( I not tested with others country )
* Frequently IP changes in STICKY session ( i prefer connection with node died instead of change IP )
* 90% nodes from USA have poor quality tunnel, the most dont reply for my all HTTP Requests ( unknown issue or thread limit )
* Try connect in some node from USA and browse to whatismyipaddress(dotcom), the web page has show rendering incomplete or broken
* Yours need put thread limit or some limit for FREE users using trial version, otherwise the network cause overload for paid users.
Waiting for reply here, tried use support form in site, 15 days ago i sent ticket, but never get any reply.