Then it's stupidity. Some folks apparently value themselves and their time so little that they'll work for no pay at all.
BINGO!!!
I never worked just for the experience.
I was recently at a HS graduation. One of the speakers said to the grads, “You will, on average, make 7 career changes in your working life.” I thought that was as little high, so I started to think about my own career changes....I came up with 9! At 2 mos. a pop, that would have been a year and a half of working for NO pay while not taking into account how expensive it is just to go to work.
BTW, that speaker was the president of WV Wesleyan University.