Not a terribly bad deal... they gave us cat food, a litterbox, litter, a cat-carrier; and 5 little companions. Price of fostering? Free.
Price of adopting? $65.00 per feline.
When we got them settled into their new 'home' (the box from my new 29" TV with one flap taped shut and the others held open) and the kittens fell asleep the mom went into explore mode. I think she really appreciates having more than just the cage, so now she can get away from the children when she feels the need.