Thank you very much towkayneo!
Hello, sure, the red eggs are free for all. Of course when you got pregnant under the blessings of ZSNN, you need to pay it forward; as in thank her in the form of red eggs. Whenever I was there praying for kids, I take the red eggs so it doesn't matter how many times you take. Anyway, if nobody takes the eggs, they would be either thrown away or given to the foreign workers there.
Regarding the chao du, you can perform the rites if you feel the need to. There is no hard & fast rule that you must do the rites. Like most women did the chao du to have a closure; close the chapter and move on to a new one.