Specifics make this discussion a lot easier. A full-time company would probably handle that scenario by evaluating the market and seeing how to leverage their

Specifics make this discussion a lot easier. A full-time company would probably handle that scenario by evaluating the market and seeing how to leverage their investment. For example, if your pop-up blocker had any intelligence to it, one approach might involve building the equivalent of adblock for IE, which I suspect would sell about as well as a popup blocker pre-builtin. Then again, I'm not sure how much of a company one could expect to build around a simple pop-up blocker, so calling yourself a company is a bit of a stretch -- it's really just a hobby. No need to apologize for being a tool, this is the Internet and it is assumed.