stacksocial have loads of deals on lifetime VPN deals. I’ve seen them for a fair bit cheaper than that, though I don’t remember how many devices were included.
Whether it’s a good deal would depend on the speed/reliability of the VPN provider in question, so it’d be worth checking for reviews or even demoing it if you can.
I’ve been very tempted by these lifetime deals (i hate locking myself into subscription services, although that seems to be the way everything is going) but the risk is that lots of small/new vpn startups seem to offer them as a way of getting exposure/users, and if they get lots of people joining up initially, but then the business doesn’t become profitable, you might end up with a service that has crappy speed and support.
(The 2 vpn services I’ve tried on one-year deals were both well reviewed, but for me 1 of them had pretty poor speeds and the other was much better. Not sure there’s any way to determine what will work for you without trying them though).