Basically many mods are like "ohhh well source can't do what we want so we're gonna switch and go indie." And then when they do they generally fail, lose some aspect of game play or graphics from source, and it just won't feel the same any more.
We can take raindrop for example. Despite team mis-communication raindrop (after making amazing scenes in source)


Decided to switch to a custom ogre engine angering the community. Then in the midst of the switch they apparently couldn't make it work as they planned and tried to go to Cryengine 3. All of this switching obviously made the apparent death of the mod as if they had just stayed with source it probably would have been done by now. Though I don't think master donut "leader" had much to do with all of the switching around. And I believe the mod was a run away train that he couldn't stop after his team took initiative to control it.
We've also recently heard of Ivans secrets switching to Cryengine 3, with the possibility of going indie with it. Their mod team is capable of it, but it also lets down many source fans. Going indie in my opinion is wonderful as long as you stick with the original ideas people "fell inlove with."

















