As for these, or any other VPNs, they have to be independently audited semi-regularly for me to believe anything they're saying regarding their policies. I know or very few that are. There are some, such as ExpressVPN have only had their extension audited. Even in that case it did not to well. There are others, like Mullvad, Hide.me, and IVPN, that have been completely audited (software and service) and have done very well. I suggest you chose one of them.