I have the Candlestick Cassia and it is loaded with eggs and we just found 3 large Sulphur cats on it. I'm not sure of its botanical name. My Christmas Cassia is smaller but also has eggs. The little wasps do take eggs/cats from lots of the host plants this time of year.

I have at least three types of cassia, bahama cassia, I think bicapsularis, and the third is an invasive one which I keep since it provides lots of food, and never has once bloomed/seeded as I am always cutting the tips for caterpillar food. Anyway, they like them all here, but yes the wasps, spiders, and others will get them when they are little, or even eggs. Then when they get bigger they begin to draw the attention of the birds, lizards, etc. So just because you do not see them does not mean they are not there.
kelly