It’s because the furry fandom, when it was founded back in the late 70’s by a gay polycule of sci-fi fans, was one of the only communities in existence that accepted openly gay and trans people. (And the only non-fetish community.) For many queer people, the furry fandom is the first place they ever feel welcome.
This was before they added F2P, but ten minutes a day of checking my two hisec market alts (who didn’t have a lot of skills because it meant pausing my main’s training) was making me just enough to pay for my account and there was room to expand further. Granted, it did take me several months of trading to build up enough funds to support this operation, but I don’t think it’s reasonable to expect to do this on day 1.