Thus goes the way of many "open source" goodies
Dangled out there for us developers/users who are enticed by the kimono wafting in the breeze, only to be brought back to the cold, cruel ground of "You want it, you gotta pay for it."
Now, I totally understand a bright individual/group wanting to get their wares exposed to as many Jills and Johns as possible. Open source it. Reap the benefits of the contributions from the open source world. Encapsulate those contributions back into the lusciousness of the main product.
Then, when us J&J's are hooked, require a pretty significant entry fee to get the next "fix".
It's sort of a rock-and-a-hard-place. Many of the other pure Open Source CRM packages have been bought out recently. I started an evaluation of possible alternatives to the ACT application of 8+ years ago and during my 4-6 month evaluation period, 2 of the OSS contenders had stopped supporting their products or had come under the wing of some commercial group.
Of course, SalesForce is always the one to beat. And, like Oracle, they will do whatever they can to beat, nay destroy, you.