One day, you could make a nice sale on this. Your best buyer would be an advertising agency or a digital design agency. You just need to hope one will have the initials fm, or call themselves fm.
Realistically, how many potential end users are there ?
You need to find:
an agency of some sort: could be advertising, fashion, anything
that uses FM in its name, or could use FM as an abbreviation ie fashion models
that won't mind using a new extension
that will be willing to pay more than regfee for it
If I look up "fm agency" in Google: I have FM Model Agency in London, also fm-agency.ch. But I don't think there are thousands of possible buyers. The points is, it's a lot of ifs and the stars have to align right.