Makes sense.
It's June 2014 to June 2015 so it only includes 2 fights (Zingano and Davis) and doesn't include her latest fight (1M PPV's) which probably netted her $3M-$5M dollars, nor would it include her most recent sponsorships, or the rights to her movie.
Davis only netted around 540K PPV's and Zingano was 590K PPV's so this was before she fully broke into the mainstream.
I'm guessing that the list for next year will catapult her well past the $10M-$15M+ per year mark given the Correia fight, the Tate fight, and possibly one additional fight if she can squeeze it in. Toss on she just picked up Hardee's/Carl's Junior, Tai Chi Panda, and no doubt has other sponsors knocking at her door.