Remember that this is from the people that believe buying a book gives them the IP rights to the work (should have bought a Harry Potter book). They may not have thought it all the way through.
To give an idea of the storage costs associated, I dug up this old stackexchange-answer about storage costs on Ethereum [0], which estimates that it costs about 76.000 USD / GB stored. Note that this is 5 year old answer, so the price will probably have multiplied like the price of ETH since then.
Edit: Here's [1] a newer, updated price estimate that takes current prices into account : 309.9 Million / GB. LoL!
To give an idea of the storage costs associated, I dug up this old stackexchange-answer about storage costs on Ethereum [0], which estimates that it costs about 76.000 USD / GB stored. Note that this is 5 year old answer, so the price will probably have multiplied like the price of ETH since then.
Edit: Here's [1] a newer, updated price estimate that takes current prices into account : 309.9 Million / GB. LoL!
[0] https://ethereum.stackexchange.com/questions/872/what-is-the...
[1] https://proderivatives.com/blog/2019/5/10/minimizing-data-st...