By no means is Brandun Lee an 'Elite Boxer', but he is a professional with a impressive record thus far (23-0 21Ko's). He fought this past Saturday, I seen a report from the payout of that showtime event and Brandun's purse was a whopping $500....
Considering they wouldn't even be able to fight in the UFC for any purse since UFCs smallest weightclass is 125 lbs I'd say it's not too bad.
Flyweight isn't a glamour division. It's the worst paid division. Purses go up as weight goes up, although top welterweights and top middleweights buck the trend since they usually have more players and thus more pound for pound talent. They actually constitute glamour divisions.
Well, ofc depends also from fights you had get, manager, promoter, how well known you are, who you had fought, country, your passport ( fans are tribal ). Chisora for example is called as journeyman in forums while he had a lot very well paid fights. First looks that was fight vs old over the hill Vitali in Russia, then Haye fight in U.K and his road to big purses just had started. While the same Rigo looks that had been offered 400k? to fight vs Loma according to wiki. Wrestler with 0-0-0 pro boxing record for fight vs YT star approx? ( dunno what this means ) 500k. Both of these looks that are more than Usyk had get for title fight vs then undefeated and in physical prime Glowacki in Poland. Damn.
Boxing has its own "Original Eight" weight divisions, also known as the "traditional", "classic" or "glamour" divisions.