In the NTF world, scarcity is an important factor. The rarer a work, the higher the price or value of the work.
This practice in the realm of art is of course not new. In music, for example, for those who still like to hunt for physical releases of music, of course, they have to pay a lot to redeem the vinyl of a good band. The price can be many times over. Why is that? Because there was an element of scarcity earlier.