...when one sells a call spread and sells a put (not put spread).
Synthetically it's just a Long Put Ladder or Christmas Tree ...

Following up after some research, I don't think any of these answers are correct, other than the Jade Lizard one. Surely Sosnoff didn't come up with a unique trading strategy that doesn't have a name, did he?
Again, sell a call spread and sell a put.
ETA: I think Jade Lizard is a term Sosnoff et al coined for the strategy.
I think Jade Lizard is a term Sosnoff et al coined for the strategy.