Needless to say, in order to do all those things I had to work 24/7 and borrow time from my personal life and my main responsibilities as a doctoral student. Obviously, I wasn't paid for doing all those things. I was paid as much as any other doctoral student who did nothing but dissertation work.
At some point I realized that this is not working well and I need to stop. It wasn't pretty - some of my profs became a bit hostile towards me. But this worked out quite well, eventually. I acquired a reputation of a person who doesn't do any favors, so professors stopped bothering me with their requests.
Despite academia positioning itself as a very altruistic place where people don't care for money, I think it's very useful for a PhD student to think in economic terms when asked to do all kinds of favors. You always have to ask yourself:
- Am I paid for this?
- Is there, at least, a potential for being paid for this in the future?