Selling font direct to consumers is extremely bad business model. This doesn’t work. People are not keen on shelling out 100s of dollars when IDEs already come with decent fonts and other thousands of free fonts readily available. This font looks great but most people would argue about marginal benefit. I would hope they would partner with IDE makers and big tech and give them license to use it for their expected revenue instead.
I also think creators of this font likely have not performed any market testing or studied price-revenue curves. I might take a bet that $5 flat price would produce higher revenues. Another option for them is to bundle many such fonts by forming group with other creators together. That has higher chance of selling a professional fonts as package to IDE makers and big tech.
Sorry, but no IDE comes with a proper 3278-like font. Not even IBM's Developer for z/OS comes with one (they commissioned that other font called Plex... who would take seriously a font named after a media player?).
That is delightful. I remember using 3270's back in "the lab" in high school ("alt-pf2" twice to compile!), and marveling at the individual phosphors on the screen. (When I could see better, for sure.)