It's along the lines of pro triathletes: there's no real bar to clear to gloss yourself as "professional." Anyone can decide to style themselves as a pro runner, whether they get nothing more than free gels and socks and wholesale pricing on shoes from the LRS or have an actual endorsement contract that they can live off of or any gradient in between. The vast majority of self-declared pro runners have lower take home income than garbage truck drivers. It's a status that carries no real rewards, except delusionally in the status bubble among fellow runners. It really just implies that you're avoiding a real career to be a peter pan syndrome dreamer, contributing little more to society than the philosopher pothead who runs a glass pipe shop. Even the relatives of a lot of these "pro runners" have to be thinking, "it's just a phase, like when he was really into pokemon in middle school." Go to Flag, Boulder, Portland, Eugene and you couldn't throw your Stryd pod without hitting at least three so-called pro runners.