I'm not really sure of your parameters here; it's unclear what you mean by radioactive (except presumably that it's bad) But from your headline, OSS and Free

I'm not really sure of your parameters here; it's unclear what you mean by radioactive (except presumably that it's bad) But from your headline, OSS and Free should be commercial. Finding a reliable income stream while keeping code open is the holy grail. Most programmers would like to share code, but they also have to eat. One is an ideal, the other is practical necessity. So when push comes to shove, money plays a part. Kudos to these companies for trying to find a good model. I'm not sure we've found it yet, but when we do, it'll be game changing.