Re: This vehicle brakes for blondes
"And what's the deal with the [sic] in the last sentence of the article?"
The Latin word 'sic' -- 'thus' (short for 'sic erat scriptum/dictum'), and is there to indicate that the error was in the original source which was quoted.
"[...]for anyone looking to earn money on their [sic] own schedule."
If you want to know what the error was -- "anyone" is singular, "their" is plural.