It's been a little better than I thought it would, I wish it was a little better, but you have to take everything into account, niche, saturation, sales, etc.
It would be nice to know what to develop, but that may be half the battle.
Thus far I've just done stuff I think is a bit more complicated, and or could be used to make other stuff.
Creating a full game might be a higher value, but then you go into saturation a lot quicker.
Plugs on the other hand would have to be of exceptional quality as they have been pretty much free so far. Then you have to take C3 into account, and the chance that it will change things.