it would be hard to make it rank + there are millions of free fonts online, so making money would be hard.
when I get a new client I usually get the font off their graphic artist/printer, if they say " umm I don't use them anymore" which is 90% of the time i ask them whats the name of the font and they say "ummm i don't know" 99% of the time then I send them a link to google fonts and get them to chose the closest font to theirs they can find.
the next day i get an email from them asking me to find the font for them and i say NOOOOOOOO as it can take hoursssssssssssssssss.
then i suggest i use a font that's kinda close and you change fonts at the next print run but at least now you will know what it is, and they say YES 100% of the time.
thus, i have never purchased a font.
so you just might find yourself the only bidder tomorrow?
tim