Hehe no the potential of NFTs are much more than this! Well, becoming a bestseller or launching a successful book is hard enough and there is no shortcut to that. But one can get as creative as possible to utilize NFTs for better engagement. As an example, if you are a new writer, you can always give away free NFTs to say first 1000 buyers. Each NFT comes with a perk such as say book reading sessions or group sessions to explain behind the scenes of the book or podcast interviews. If readers find it valuable, the value of NFT will eventually grow and people may want to buy it from marketplace. You can earn money through royalties (say 5-10%) of every sale. Possibilities are many :)