My understanding is that the mechanism by which this works lets you sidestep it pretty neatly by also doing basically similar things for free. That way you can credibly tell yourself that you would do it for free, and being paid is unrelated.
That seems to work. If I were teaching part-time simply because I needed the money, I wouldn't do it. But I decided that I'd teach this class for free, so I also have no problem doing it for very little money.
We've had these for a year, I'm sure we all know what to do by now.
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