Commercial use of Free demo (such as Trash dash)

Hi, I would like to know before I implent this game on my app if its ok to use some of the demo such as Trash Dash that I have aquired in the Asset store (even though its for free) and put them on my app and generate revenue at some point generate revenue on them. I have seen some ''sales policy'' that we're pretty clear that It was ok for commercial use but its not clear for every asset since they dont always put the ''sales policy''. Thank you very much for your support !