Sure, but it's not more valuable than $30 + regular price increases for 60+ years. That's what a lifetime membership is.

Lets flip that around: For my own finances $300 is a lot more valuable than $30 for 10 years. So if I'm to expect that the company will go out of business in 10 years or so, I would have been better off paying for the subscription.

Lets also not forget that companies don't take that $300 and responsibly invest it. It gets reinvested in a risky bid to grow the company and get enough people to subscribe in order to pay for your service going forward.