Tragedy of the commons, since PIA is popular, its naturally popular with people with actual sockpuppeting and webscraping to do. Switching VPNs to a less popular provider may provide temporary relief, if they are routing through IPs that are not infested with bots.

To get around this and the other Captcha-related annoyances, PIA now offers dedicated IP as a $40-per-year add on:

https://www.privateinternetaccess.com/vpn-features/dedicated...