It goes a bit beyond OSS; try doing anything important in life and you'll be a target sooner or later. Jealousy is a powerful force; ignorant mobs are powerful forces and there are a lot of evil opportunists in the mix. People really need to get a little more cynical at a young age. Everyone should be doing things because they think it is in their personal best interests. People can still be altruists, but it is important to understand that is a personal belief in what a local optimum looks like and it can't be seen as a noble sacrifice.

I thought this dev's attitude was fairly healthy. Try something, see it didn't work, start charging.