alt Hacker NewsI've got a Nebula lifetime membership and it's neat. I actually discovered channels through it (Not Just Bikes, WonderWhy, 12tone,...) which I hadn't heard of before. I also paid for YT Premium Lite in the past. The full YT Premium is too expensive for me, though.
But I feel a better example of paying for convenience is the Twitch subscriber system. They make it work in a way that others fail at by tying it in to various things like emotes and channel points and the general sense of supporting the creators. I know YT memberships exist, but I don't know how widely those are used and they just don't seem to get pushed as much.
Twitch also lets people pay more than just the service price. So you'll they some people paying for themselves, but you'll also get whales paying for hundreds of other people. No other site I know of lets you do that really.