Not to whip a dead horse because the money is better than some of the part-time jobs listed but I'm wondering how many F2 female visa holders are there?
Firstly about 90% of all F2 visa holders are south-east asian mail order brides. I have worked in korea now for 15years and I have only ever known of one woman who has an f2 visa(married to a korean man). I don't think it's a long shot to say that of the 10% of us that are teachers on F2/f5, 90% or more of that are men.
A female teacher here(from back home) with an F2 visa could write her own ticket. Most certainly be working at a university or college quicker than any man could get his foot in the door. I'm sure would demand way more than what's being offered for even part-time work. This ad's poster should realize the phone will not be ringing off the hook but it's ok to dream I guess. Koreans seem to think they can just 'get another' teacher.....not of this type, this is rare and exotic.