1) Do you now, 2) have you ever, 3) or would you ever work in a profession wherein your facial attractiveness is a deciding factor in pay? ~

Back when I was a student, one of my part-time casual jobs was with a modelling agency.
Mostly they sent me bit-part roles in T.V. advertisements.
I also did casual modelling for artists.
My face was a critical factor for either, but it may have helped.

I had the chance to pursue acting at one point. Appearance in a couple of amateur productions of plays by Ibsen and Pinta resulted in an uninvited offer of a place at drama school. I didn't take it because I disliked the culture of fame and celebrity that is a bi-product of film, theatre and performance. I feared that if I got hooked into that kind of thinking it would have a negative effect on me. Looking back over my life and issues, I think it was a good guess.

I would be a millionaire.

If you saw this "mug", you would already have my answer.

Sort of -  I worked for seven years in a very high end health club.  They didn't blatantly require job applicants to be attractive...but they kind of did...   

haha
they would never hire me
no pretty faces here

If that were a prerequisite .. I would be starving today.  :)

I do,I have and I would...   :) 

I haven't specifically applied for employment where my facial features would be a deciding factor, but I'm pretty sure that my overall appearance has helped me gain employment.

i used to work at the make up counter in macy's 

they dont say you have to look nice but it's def implied. if your make up looks nice then potential buyers are more likely to trust you, buying what you are selling and earning you a commission 

Nah. 

I'd rather prefer my work to be a deciding factor!