> $31.66 a month for a wordpress hosting plan is an absolute rip-off.

Today, maybe. For the human costs of hosting support in 2123, given the cost of inflation, it might not be, and these plans include technical support.

(Although you could also that the technical support work on most of these 100-year plans should be dropping over time too - especially if the human being involved passes away. You could even argue that AI might be doing the technical support in 2123.)

Today for sure. But if someone twenty years ago said I could have 100 years of Starbucks lattes for $2/each, it would have turned out to be a great deal. It depends if hosting is affected by inflation or not.

But back then $2 would have been worth more than $2 is now so, assuming you paid upfront, you'd be no better off.

It would depend on how much price inflation correlated to currency inflation.