"we have seen competitors actively exploiting our good faith by using our open source code to compete with us directly in commercial products. On the flip side, we have received almost no meaningful contributions to our open source code."

The first indicates that they unwisely picked a license that allowed their competitors to do that and hoped they would share out of the kindness of their heart, the second indicates that they failed to find people interested in working for free on their commercial product.

Maybe if they had been less generous with their competitors they would have paid them money which could have made it possible to keep it free.

So no the "freetards" didn't kill it and by using such terms instead of logical arguments you reveal the quality of your intellect.