Some companies offer cheap 'lifetime' membership packages for VPNs, then 6-12 months down the road they decide to shut down and your money goes to waste.
This deal offers a lifetime licence key, so if they happen to shut down anytime soon it wouldn't matter as its totally free of charge. Good reviews on it here https://www.vpnmentor.com/reviews/windscribe-vpn/
No DNS leak with this one :D
Software download page, use code 50GBFREE