Tutor marketplace; set your own rate ([figure removed] avg)
What you need
You must reside in the United States and have a valid Social Security Number, per their terms
How you get paid
Hourly you set; flat 25% platform fee (after-earning)
Worker costs
Taken out of what you earn, not upfront — their own terms name 'the Platform Fee arranged between the Tutor and Wyzant' among the charges on each lesson.