Hi friends,I think trusting to a company is not belong to be paid or free,btw its depend on vpn provider company most trusted company also have free and paid plan,same as CG or Windscribe,the second point of a trusted company is the country of them, same as : you can't trust a company how the HQ of them In USA because its unders NSA mass surveillanc.
third : do't trust vpn company who do't support Bitcoin and anonymous payment because they can trace you easily from your info
fourth : keep close attention the law of vpn company many of them same as "Security Kiss Tunnel" has restriced law against pornographic it mean if you acceess a site how contain "these" they will terminate your account and saved your money
fifth: do't trust vpn company under law of US law,trust vpns how under EU law and another blah blah
hope to help you