[jnbiche]

> Just because React doesn't use your favorite license?

No, that's not the problem for many(most?) of us. The problem is that Facebook has decided to throw out innovative extra conditions to an old and established license. Innovation is typically not a good thing with open source licenses. It just throws a lot of uncertainty and confusion onto the situation, and for what gain? In fact, no one has any clue how this patent grant will work in practice.

If we believe the minimalist interpretation that some people are proposing here, Facebook has gained virtually nothing here. And that fact in itself makes people suspicious, because why would they dig in for almost no gain?

[chrisco255]

Because Facebook has been sued, even by big players like Yahoo. If Yahoo sues them for patent infringement, they want to be able to say, yo...what about all that free code we gave you?