That is the problem though - I'm not entirely sure I am convinced that my change of mind has been done in good faith.
In hindsight, I think I was merely using these people for the sake of market research. The product that I left as PWYW seems to be doing better than those that I am selling for cheap and that is why I want to shift those back to the PWYW format.
I don't think any of that really constitutes good faith.
Sure it does. That's market research and being curious about how pricing works. That's not unethical.