http://www.linkedin.com/company/spark-u ... statistics
The graph in the middle represents the amount of employees are working at Spark.
It seems that Spark have not hired other people since January and might not need anymore.
On the right, you see where a number of Spark's employees came from and eventually left to.
Four of them came from Pandemic Studios. This might not mean anything but since they where former Battlefront developers, it makes sense hiring these people.
"If a stupid plan works, then it ain't stupid"
And also seven people from Rebellion joined Crytek???

http://www.linkedin.com/company/crytek/statistics