Earlier quoted context omitted.
Can you elaborate how this is exploiting? I am a SWE engineer with photography as a hobby. If a tv show contacted me to do a wedding shoot, I'd be excited for the coverage and I wouldn't feel exploited since doing shoots is fun for me. I could see how there are parallels to the "background actor" industry where, by law, you have to pay all of the talent on screen, even if its a nominal amount and the actor would of w…
I hope you can see the difference between doing something for free when it's your hobby, vs. doing something for free when it's your career. If a TV show contacted you do create a web app, would you do that work for free? Would you give up other opportunities to get paid to do so?
So, say no? (I've done that a couple of times in similar situations.)