Private Internet Access, usually called PIA, is a virtual private network that publishes its client apps as open source. Its own site describes a no-logs policy, and it lists split tunneling and a SOCKS5 proxy among the options in the app. People use it for private browsing and for streaming.
Apps are offered for common phones, computers, and browsers. One subscription can cover several devices at the same time, within the plan limits PIA sets. PIA states a money-back guarantee on plans it sells itself. The open-source notice and the no-logs description both live on the PIA site.
Where this page shows an Up to cashback rate, that rebate is from KPON, not from Private Internet Access, and it follows the terms above.