I dunno - to get jobs some places you need to be really good at leetcode - and that's a niche skill that is increasingly hard to keep current at as you get older, busier in your role and family life.

I'm not confident that I could do a leetcode medium anymore, but I am super confident I could do a similar role to the one I currently do at a company that would only hire me for it if I could do a leetcode medium.

I would never actually use a service like this but I can't say I'm not tempted.